I discovered another segment that would not be acceptable for modern-day airings. It is the Herbert Birdsfoot M/W lecture, but it is not due to the rotating camera angle. I think it is more due to the uncooperative letter blowing a raspberry towards Herbert, which would be deemed inappropriate, or at least questionable, today.
There is at least one other Herbert Birdsfoot segment that would not be acceptable, and that is one where Grover slaps Herbert on the back upon arrival for the lecture - I am not sure what segment that is. There is also another segment where Grover comes in an says "Hey, Herbie, baby!" - that would sound very sexist nowadays, but I wonder if HBO Max ever aired any Kermit's lecture sketch where Grover comes in and says "Hey, Kermit, baby!"