NTA. Couples don’t have to like all the same things and do EVERYTHING together. I’ve been married for a very long time. My husband likes to go fishing and I can’t think of anything I’d like to do less than fish. So he goes alone while I sleep in. I like to paint or make crafts, so he watches really bad action movies while I do my thing. We do other things together like cooking or binge watching older shows we never watched in the past. Point is that she shouldn’t take it personally that you don’t really want to watch Tik Tok vids constantly. I think it’s great that she occasionally sends you vids that she thinks you’ll like. That should be enough for her.