Update: Actual video experts have weighed in on this and apparently the video is not greenscreened. The glitches everyone’s seeing are video compression artifacts.
I loathe retweeting or embedding Trump’s actual tweets – I’d much rather screenshot them. He deletes stuff all the time, plus he just doesn’t need the attention. But I want to point out that this video is greenscreened. If you watch the upper right corner, you can see when the background video loops.