An op-ed is an outside opinion piece published by a news organization, historically in a print newspaper or magazine.
It's irrelevant if he's giving his opinion on a subject in a YouTube video; it's still not journalism (and it's not even an op-ed, since he's effectively self-publishing).
I don't consider Kimmel a journalist anymore than I consider him funny — all his jokes were written for him. He helmed a failing TV show, for which he was being paid millions.
None of that stops him from trying to present himself as a journalist or a comedian.
I know what an op ed is. You don't need to tell me. It doesn't have to be in print anymore. (You obviously looked up that definition somewhere.)
Your entire argument hinges on the claim that he's presenting himself as a journalist. He's not doing that. You're not arguing in good faith and it's clear you have an axe to grind - so I'm going to disengage now.
It's irrelevant if he's giving his opinion on a subject in a YouTube video; it's still not journalism (and it's not even an op-ed, since he's effectively self-publishing).