chore(docs): finish most of v2's documentation

docs/API/account.md

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+# Account
+
+YouTube account manager.
+
+## API
+
+* Account 
+  * [.channel](#channel)
+  * [.getInfo()](#getinfo)
+  * [.getTimeWatched()](#gettimewatched)
+  * [.getSettings()](#getsettings)
+  * [.getAnalytics](#getanalytics)
+
+<a name="channel"></a>
+### channel
+
+Channel settings.
+
+**Returns:** `object`
+
+<details>
+<summary>Methods & Getters</summary>
+<p>
+
+- `<channel>#editName(new_name)`
+  - Edits the name of the channel.
+
+- `<channel>#editDescription(new_description)`
+  - Edits channel description.
+
+- `<channel>#getBasicAnalytics()`
+  - Alias for [`Account#getAnalytics()`](#getanalytics) — returns basic channel analytics.
+
+</p>
+</details>
+
+<a name="getinfo"></a>
+### getInfo()
+
+Retrieves account information.
+
+**Returns:** `Promise.<AccountInfo>`
+
+<details>
+<summary>Methods & Getters</summary>
+<p>
+
+- `<accountinfo>#page`
+  - Returns original InnerTube response (sanitized).
+
+</p>
+</details>
+
+<a name="gettimewatched"></a>
+### getTimeWatched()
+
+Retrieves time watched statistics.
+
+**Returns:** `Promise.<TimeWatched>`
+
+<details>
+<summary>Methods & Getters</summary>
+<p>
+
+- `<timewatched>#page`
+  - Returns original InnerTube response (sanitized).
+
+</p>
+</details>
+
+<a name="getsettings"></a>
+### getSettings()
+
+Retrieves YouTube settings.
+
+**Returns:** `Promise.<Settings>`
+
+<details>
+<summary>Methods & Getters</summary>
+<p>
+
+- `<settings>#selectSidebarItem(name)`
+  - Selects an item from the sidebar menu. Use `settings#sidebar_items` to see available items.
+
+- `<settings>#getSettingOption(name)`
+  - Finds a setting by name and returns it. Use `settings#setting_options` to see available options.
+
+- `<settings>#setting_options`
+  - Returns settings available in the page.
+
+- `<settings>#sidebar_items`
+  - Returns options available in the sidebar menu.
+
+</p>
+</details>
+
+<a name="getanalytics"></a>
+### getAnalytics()
+
+Retrieves basic channel analytics.
+
+**Returns:** `Promise.<Analytics>`
+
+<details>
+<summary>Methods & Getters</summary>
+<p>
+
+- `<analytics>#page`
+  - Returns original InnerTube response (sanitized).
+
+</p>
+</details>

docs/API/interaction-manager.md

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+# InteractionManager
+
+Handles direct interactions.
+
+## API
+
+* InteractionManager 
+  * [.like(video_id)](#like) 
+  * [.dislike(video_id)](#dislike) 
+  * [.removeLike(video_id)](#removelike) 
+  * [.subscribe(video_id)](#subscribe) 
+  * [.unsubscribe(video_id)](#unsubscribe) 
+  * [.comment(video_id, text)](#comment) 
+  * [.translate(text, target_language, args?)](#translate) 
+  * [.setNotificationPreferences(channel_id, type)](#setnotificationpreferences) 
+
+<a name="like"></a>
+### like(video_id)
+
+Likes given video.
+
+**Returns:** `Promise.<ActionsResponse>`
+
+| Param | Type | Description |
+| --- | --- | --- |
+| video_id | `string` | Video id |
+
+<a name="dislike"></a>
+### dislike(video_id)
+
+Dislikes given video.
+
+**Returns:** `Promise.<ActionsResponse>`
+
+| Param | Type | Description |
+| --- | --- | --- |
+| video_id | `string` | Video id |
+
+<a name="removelike"></a>
+### removeLike(video_id)
+
+Remover like/dislike.
+
+**Returns:** `Promise.<ActionsResponse>`
+
+| Param | Type | Description |
+| --- | --- | --- |
+| video_id | `string` | Video id |
+
+<a name="subscribe"></a>
+### subscribe(channel_id)
+
+Subscribes to given channel.
+
+**Returns:** `Promise.<ActionsResponse>`
+
+| Param | Type | Description |
+| --- | --- | --- |
+| channel_id | `string` | Channel id |
+
+<a name="unsubscribe"></a>
+### unsubscribe(channel_id)
+
+Unsubscribes from given channel.
+
+**Returns:** `Promise.<ActionsResponse>`
+
+| Param | Type | Description |
+| --- | --- | --- |
+| channel_id | `string` | Channel id |
+
+<a name="comment"></a>
+### comment(video_id, text)
+
+Posts a comment on given video.
+
+**Returns:** `Promise.<ActionsResponse>`
+
+| Param | Type | Description |
+| --- | --- | --- |
+| video_id | `string` | Video id |
+| text | `string` | Comment content |
+
+<a name="translate"></a>
+### translate(text, target_language, args?)
+
+Translates given text using YouTube's comment translation feature.
+
+**Returns:** `Promise.<ActionsResponse>`
+
+| Param | Type | Description |
+| --- | --- | --- |
+| text | `string` | Text to be translated |
+| target_language | `string` | ISO language code |
+| args? | `object` | Additional arguments |
+
+<a name="setnotificationpreferences"></a>
+### setNotificationPreferences(channel_id, type)
+
+Changes notification preferences for a given channel.
+Only works with channels you are subscribed to.
+
+**Returns:** `Promise.<ActionsResponse>`
+
+| Param | Type | Description |
+| --- | --- | --- |
+| channel_id | `string` | Channel id |
+| type | `string` | `PERSONALIZED`, `ALL` or `NONE` |

docs/API/music.md

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+# Music
+
+YouTube Music class.
+
+## API
+
+* Music 
+  * [.getInfo(video_id)](#getinfo)
+  * [.search(query, [filters?])](#search)
+  * [.getHomeFeed()](#gethomefeed)
+  * [.getExplore()](#getexplore)
+  * [.getLibrary()](#getlibrary)
+  * [.getArtist(artist_id)](#getartist)
+  * [.getAlbum(album_id)](#getalbum)
+  * [.getPlaylist(playlist_id)](#getplaylist)
+  * [.getLyrics(video_id)](#getlyrics)
+  * [.getUpNext(video_id)](#getupnext)
+  * [.getRelated(video_id)](#getrelated)
+  * [.getSearchSuggestions(query)](#getsearchsuggestions)
+
+<a name="getinfo"></a>
+### getInfo(video_id)
+
+Retrieves track info.
+
+**Returns:** `Promise.<TrackInfo>`
+
+| Param | Type | Description |
+| --- | --- | --- |
+| video_id | `string` | Video id |
+
+<a name="search"></a>
+### search(query, [filters?])
+
+Searches on YouTube Music.
+
+**Returns:** `Promise.<Search>`
+
+| Param | Type | Description |
+| --- | --- | --- |
+| query | `string` | Search query |
+| filters? | `object` | Search filters |
+
+<details>
+<summary>Methods & Getters</summary>
+<p>
+
+- `<search>#getMore(shelf)`
+  - Equivalent to clicking on the shelf to load more items.
+
+- `<search>#getContinuation()`
+  - Retrieves continuation, only works for individual sections or filtered results.
+
+- `<search>#selectFilter(name)`
+  - Applies given filter to the search.
+
+- `<search>#has_continuation`
+  - Checks if continuation is available.
+
+- `<search>#filters`
+  - Returns available filters.
+
+- `<search>#songs`
+  - Returns songs shelf.
+
+- `<search>#videos`
+  - Returns videos shelf.
+
+- `<search>#albums`
+  - Returns albums shelf.
+
+- `<search>#artists`
+  - Returns artists shelf.
+
+- `<search>#playlists`
+  - Returns songs shelf.
+
+- `<search>#page`
+  - Returns original InnerTube response (sanitized).
+
+</p>
+</details> 
+
+<a name="gethomefeed"></a>
+### getHomeFeed()
+
+Retrieves home feed.
+
+**Returns:** `Promise.<HomeFeed>`
+
+<details>
+<summary>Methods & Getters</summary>
+<p>
+
+- `<homefeed>#getContinuation()`
+  - Retrieves continuation, only works for individual sections or filtered results.
+
+- `<homefeed>#has_continuation`
+  - Checks if continuation is available.
+
+- `<homefeed>#page`
+  - Returns original InnerTube response (sanitized).
+
+</p>
+</details> 
+
+<a name="getexplore"></a>
+### getExplore()
+
+Retrieves “Explore” feed.
+
+**Returns:** `Promise.<Explore>`
+
+<details>
+<summary>Methods & Getters</summary>
+<p>
+
+- `<explore>#page`
+  - Returns original InnerTube response (sanitized).
+
+</p>
+</details> 
+
+<a name="getlibrary"></a>
+### getLibrary()
+
+Retrieves library.
+
+**Returns:** `Promise.<Library>`
+
+<!-- TODO: document Library's methods and getters. -->
+
+<a name="getartist"></a>
+### getArtist(artist_id)
+
+Retrieves artist's info & content.
+
+**Returns:** `Promise.<Artist>`
+
+| Param | Type | Description |
+| --- | --- | --- |
+| artist_id | `string` | Artist id |
+
+<details>
+<summary>Methods & Getters</summary>
+<p>
+
+- `<artist>#page`
+  - Returns original InnerTube response (sanitized).
+
+</p>
+</details> 
+
+<a name="getalbum"></a>
+### getAlbum(album_id)
+
+Retrieves given album.
+
+**Returns:** `Promise.<Album>`
+
+| Param | Type | Description |
+| --- | --- | --- |
+| album_id | `string` | Album id |
+
+<details>
+<summary>Methods & Getters</summary>
+<p>
+
+- `<album>#page`
+  - Returns original InnerTube response (sanitized).
+
+</p>
+</details> 
+
+<a name="getplaylist"></a>
+### getPlaylist(playlist_id)
+
+Retrieves given playlist.
+
+**Returns:** `Promise.<Playlist>`
+
+| Param | Type | Description |
+| --- | --- | --- |
+| playlist_id | `string` | Playlist id |
+
+<details>
+<summary>Methods & Getters</summary>
+<p>
+
+- `<playlist#getRelated()`
+  - Retrieves related playlists.
+
+- `<playlist#getSuggestions()`
+  - Retrieves playlist suggestions.
+
+- `<playlist#getContinuation()`
+  - Retrieves continuation.
+
+- `<playlist>#has_continuation`
+  - Checks if continuation is available.
+
+- `<playlist>#page`
+  - Returns original InnerTube response (sanitized).
+
+</p>
+</details> 
+
+<a name="getlyrics"></a>
+### getLyrics(video_id)
+
+Retrieves song lyrics.
+
+**Returns:** `Promise.<{ text: string; footer: object; }>`
+
+| Param | Type | Description |
+| --- | --- | --- |
+| video_id | `string` | Video id |
+
+<a name="getupnext"></a>
+### getUpNext(video_id)
+
+Retrieves up next content.
+
+**Returns:** `Promise.<PlaylistPanel>`
+
+| Param | Type | Description |
+| --- | --- | --- |
+| video_id | `string` | Video id |
+
+<a name="getrelated"></a>
+### getRelated(video_id)
+
+Retrieves related content.
+
+**Returns:** `Promise.<Array.<MusicCarouselShelf | MusicDescriptionShelf>>`
+
+| Param | Type | Description |
+| --- | --- | --- |
+| video_id | `string` | Video id |
+
+<a name="getsearchsuggestions"></a>
+### getSearchSuggestions(query)
+
+Retrieves search suggestions.
+
+**Returns:** `Promise.<Array.<SearchSuggestion | HistorySuggestion>>`
+
+| Param | Type | Description |
+| --- | --- | --- |
+| query | `string` | Search query |

docs/API/playlist.md

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+# PlaylistManager
+
+Playlist management class.
+
+## API
+
+* PlaylistManager
+  * [.create(title, video_ids)](#create) 
+  * [.delete(playlist_id)](#delete) 
+  * [.addVideos(playlist_id, video_ids)](#addvideos) 
+  * [.removeVideos(playlist_id, video_ids)](#removevideos) 
+  * [.moveVideo(playlist_id, moved_video_id, predecessor_video_id)](#movevideo) 
+
+<a name="create"></a>
+### create(title, video_ids)
+
+Creates a playlist.
+
+**Returns:** `Promise.<ActionsResponse>`
+
+| Param | Type | Description |
+| --- | --- | --- |
+| title | `string` | Playlist name |
+| video_ids | `string[]` | array of videos |
+
+<a name="delete"></a>
+### delete(playlist_id)
+
+Deletes given playlist.
+
+**Returns:** `Promise.<ActionsResponse>`
+
+| Param | Type | Description |
+| --- | --- | --- |
+| playlist_id | `string` | Playlist id |
+
+<a name="addvideos"></a>
+### addVideos(playlist_id, video_ids)
+
+Adds videos to given playlist.
+
+**Returns:** `Promise.<{ playlist_id: string; action_result: any[] }>`
+
+| Param | Type | Description |
+| --- | --- | --- |
+| playlist_id | `string` | Playlist id |
+| video_ids | `string` | array of videos |
+
+<a name="removevideos"></a>
+### removeVideos(playlist_id, video_ids)
+
+Removes videos from given playlist.
+
+**Returns:** `Promise.<{ playlist_id: string; action_result: any[] }>`
+
+| Param | Type | Description |
+| --- | --- | --- |
+| playlist_id | `string` | Playlist id |
+| video_ids | `string` | array of videos |
+
+<a name="movevideo"></a>
+### moveVideo(playlist_id, moved_video_id, predecessor_video_id)
+
+Moves a video to a new position within a given playlist.
+
+**Returns:** `Promise.<{ playlist_id: string; action_result: any[] }>`
+
+| Param | Type | Description |
+| --- | --- | --- |
+| playlist_id | `string` | Playlist id |
+| moved_video_id | `string` | the video to be moved |
+| predecessor_video_id | `string` | the video present in the target position |

docs/API/session.md

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+# Session
+
+Represents an InnerTube session.
+
+## API
+
+* Session
+  * [.signIn(credentials?)](#signin) ⇒ `function`
+  * [.signOut()](#signout) ⇒ `function`
+  * [.key](#key) ⇒ `getter`
+  * [.api_version](#api_version) ⇒ `getter`
+  * [.client_version](#client_version) ⇒ `getter`
+  * [.client_name](#client_name) ⇒ `getter`
+  * [.context](#context) ⇒ `getter`
+  * [.player](#player) ⇒ `getter`
+  * [.lang](#lang) ⇒ `getter`
+
+<a name="signin"></a>
+### signIn(credentials?)
+
+Signs in with given credentials. 
+
+**Returns:** `Promise<void>`
+
+| Param | Type | Description |
+| --- | --- | --- |
+| credentials? | `Credentials` | OAuth credentials |
+
+<a name="signout"></a>
+### signOut()
+
+Signs out of the current account.
+
+**Returns:** `Promise<ActionsResponse>`
+
+<a name="key"></a>
+### key
+
+InnerTube API key.
+
+**Returns:** `string`
+
+<a name="api_version"></a>
+### key
+
+InnerTube API version.
+
+**Returns:** `string`
+
+<a name="client_version"></a>
+### client_version
+
+InnerTube client version.
+
+**Returns:** `string`
+
+<a name="client_name"></a>
+### client_name
+
+InnerTube client name.
+
+**Returns:** `string`
+
+<a name="context"></a>
+### context
+
+InnerTube context.
+
+**Returns:** `Context`
+
+<a name="player"></a>
+### player
+
+Player script object.
+
+**Returns:** `Player`
+
+<a name="lang"></a>
+### lang
+
+Client language.
+
+**Returns:** `string`

docs/API/studio.md

@@ -0,0 +1,33 @@
+# Studio
+
+YouTube Studio class (WIP).
+
+## API
+
+* Studio 
+  * [.setThumbnail(video_id, buffer)](#setthumbnail)
+  * [.upload(file, metadata)](#upload)
+
+<a name="setthumbnail"></a>
+### setThumbnail(video_id, buffer)
+
+Uploads a custom thumbnail and sets it for a video.
+
+**Returns:** `Promise.<ActionsResponse>`
+
+| Param | Type | Description |
+| --- | --- | --- |
+| video_id | `string` | Video id |
+| buffer | `Uint8Array` | Thumbnail buffer |
+
+<a name="upload"></a>
+### upload(file, metadata)
+
+Uploads a video to YouTube.
+
+**Returns:** `Promise.<ActionsResponse>`
+
+| Param | Type | Description |
+| --- | --- | --- |
+| file | `BodyInit` | Video file |
+| metadata | `VideoMetadata` | Video metadata |