Hello James! No, by shaking I mean the entire video, for example if you look closely you will see that the black bars are shaking a little, and the CC’s also!
The Sequence settings:

And the bug is a Loseless .mov with alpha, at first I thought that maybe this was causing the problem but turns out that it also happens when the bug isn’t on the video. The trailer videos are mostly .mp4 h264
Thanks!