I dont know if there is a use of this way to bypass the 3arc loading sign, but what i did was,

1. join lobby alone in theater

2. select a video from recent games (any game is fine) make sure its not modified in any way.

3. then go hover over the video if you have access to it,

4. click the video and hit like or dislike, then click b and then click on the video itself, give it like 10 seconds and video will be loaded,

The error i get when trying to play it is You have selected an invalid film or clip.

If anyone can do anything from here hope this helps!