Pretty good trailer, just a few things I would change.
The video must be under 30 seconds to upload to Roblox.
I would get rid of the little bar at the end as no one is going to copy the link word for word, and for the group name, I would just grab your logo if you have one and put it somewhere on there.
As @SomeFedoraGuy said, get rid of the mouse, and also all UI like the leaderboard. Trailers from DOORS and other games do this to express professionalism and also it’s just cleaner.
Recommended getting rid of the ESRB rating you added, as they did not rate your game.
There are other minor things, but I’m not trying to tear your work apart. I think that you are headed in the right direction for it. I hope you use my suggestions to improve your trailer.