Trump being 'on board' with all of this is one of my more substantial reasons for not believing it's fake. After all, if all of this has just been political theater thus far, then they'd not have to fake Trump saying anything...he'd just say it.
If it is faked, I'd have to think Twitter was responsible, posted it, and nobody on the Trump team has access to it (or other social media accounts) to be able to say so. But the obvious response to this is that anyone adjacent to him could use their accounts to spread the word that Twitter was faking the video.
So, the chances are practically zero.
Which means that I made a thread most likely for the reason that I was in an emotionally heightened state due to the feeling I had while watching the video that something felt off. That excited me and caused me to entertain my immediate impulse to circle jerk about possibilities before my rational faculties were able to convince me not to.
Happens to the best of us.
Just to add, in case you're not aware, it was also posted on his official YouTube account: https://www.youtube.com/watch?v=iFADopBnb_U
(post is archived)