I think the focus should be on the ones with the most confusion. To make the video more interesting, it'd probably be a good idea to talk about why some names get pronounced one way rather than the other, like if you were explaining to someone how to pronounce Sean. If you want, you could even do a bit of etymology. Another thing is that rather than say certain pronunciations are wrong, maybe just point out which ones are official, other ways people pronounce them and if it has anything to do with accent or regional stuff. With the abundance of accents and dialects, I think it's perfectly reasonable to consider multiple pronunciations acceptable. Are you planning on only going over the english names or bring up the original japanese as well?