People have been posting all over the forums about it and I just feel the need to throw my hat in the ring since none of these posts are gaining traction.
At about 2:11 in the most recent Twitter Trump video, if you pay close attention to his neckline you'll see noticeable black gaps appear between his neck and suit (keep watching after you hit play). There seems to be some CG/green screen stuff going on. Possible deep fake. Check for yourselves. Go to his twitter feed, turn off volume, go to 2:11 hit play and watch closely.
There are other very weird visual things about the video, but that's the big one.
EDIT: Just saw an even more noticeable neckline gap at roughly 0:19 mark. There's no way that's normal.
I think both videos are deep fakes, even if there weren't visual glitches. My gut just tells me that is NOT Trump and he was taken around the time of the Capitol march.