Maybe the joking was good-natured and not mean-spirited. Regardless of who occupies the White House - even if it's a fraudulently elected president like Biden - a classy person does not go there to embarrass the sitting president. So I could see Brady acting all buddy-buddy with him. But if he genuinely insulted Trump and/or his supporters, I will lose a lot of respect for him.
So I'm watching the clip first and not basing my opinion on replies to an Internet thread.
And I'm still not watching football this year either way.
I watched the 30 second clip. It was a calculated joke by Brady, not a diss of Trump or Biden, just poking some light-hearted fun. Nothing to be upset about in the slightest.