add self_video support

types/guild.ts

@@ -550,6 +550,8 @@ export interface Voice_State {
   self_mute: boolean;
   /** whether this user is streaming using "Go Live" */
   self_stream?: boolean;
+  /** whether this user's camera is enabled */
+  self_video?: boolean;
   /** whether this user is muted by the current user */
   suppress: boolean;
 }