[Suggestion] In-Game Video Queue Support

[ShiguriVR]

It would be nice if there could be an in-game video queue with UI added to the prefab. Using this, people could add videos to a list that the player goes through procedurally.

Nice for group watch sessions where everyone wants to just toss things onto the player rapidly. This queues them up so that people don't need to wait for the last video to finish playing, and avoids the issue of several people trying to play different videos at once.

Additionally, a shuffle button would be cool, in case randomization of play order is desired.

I suppose the queue should not be enabled by default, and once enabled the normal URL field gets locked and directs people to add videos to queue list instead, can think of it like a hopper that feeds into the URL field and could even design the UI to convey that visually.

Edit: Didn't realize #18 already exists, feel free to merge this there.