https://news.yahoo.com/trump-dismisses-covid-19-booster-184022005.html
It sounds like Trump is now beginning to publicly cast some doubt on the vaccines. He's starting cautiously, by questioning the booster shots, but I suspect (hope) that he will be slowly ramping up the questioning and criticism going forward, from here on out.
He said he took it in the video OP posted.
He never says which one though!
There's only one actual vaccine, J&J. The others are NOT vaccines. We know a few docs who early on decided on taking the J&J for that specific reason, it was the only virus-based injection.
That was before they knew "covid-19" has not been isolated and the shots were developed from lab-created supplies of other Coronas. Meaning of course that having had one corona-shaped virus (some of which are common cold) gives you immunity from all of them.
Here you go. He was speaking about JnJ:
https://nypost.com/2021/04/19/trumps-urges-americans-to-get-vaccines-takes-shot-at-jj-pause/