Only thing that bothered me about that video is that he kept using male pronouns to refer to Transmutate. She's female!
Personally I think ANY episode from ANY season could of easily been on this list. I don't think there are really any bad episodes.
Go with the Flow is easily the worst. It's just so bad. It's literally just filler to go in between Proving Grounds and Crossing the Rubicon. It's my same problem with Transmutate.
Ηm....I decided to watch the series this weekend. I tried to watch it back in the day but after seeing a little bit of the first episode, wee me bursted to tears of laughter and switched the TV off. Crossing my fingers.
The Agenda Part 3 & Optimal Situation- my favorite BW episodes ever. I just love how they blended the BW story into G1, it was so well done- and even as a kid I didn't see that coming- I didn't think, for a split second, that the Ark or anything G1 would pop up in BW- so when it did: I completely lost my mind. Such great episodes.