feat: Video receiver (2/n)

- Only VP8 supported
- With example JSDoc
- Tested but bad quality

typings/index.d.ts

@@ -1076,6 +1076,8 @@ export class StreamConnection extends VoiceConnection {
 export class VoiceReceiver extends EventEmitter {
   constructor(connection: VoiceConnection);
   public createStream(user: UserResolvable, options?: { mode?: 'opus' | 'pcm'; end?: 'silence' | 'manual' }): Readable;
+  /** @deprecated Only recorded VP8 stream */
+  public createVideoStream(user: UserResolvable): IvfJoinner;
 
   public on(event: 'debug', listener: (error: Error | string) => void): this;
   public on(event: string, listener: (...args: any[]) => void): this;
@@ -1084,6 +1086,13 @@ export class VoiceReceiver extends EventEmitter {
   public once(event: string, listener: (...args: any[]) => void): this;
 }
 
+export class IvfJoinner {
+  constructor(codec: 'VP8');
+  public stream: Readable;
+  public stop(): void;
+  public createFinalFile(read: Readable, write: Writable): void;
+}
+
 export { Collection } from '@discordjs/collection';
 
 export interface CollectorEventTypes<K, V, F extends unknown[] = []> {