You make clear that your video is about music, but if I were you I would not put "Music for Creators". I mean: for creators, so I could only listen if I'm a creator? But I'm not a creator, I may not listen? And most people who sees your thumbnail is like: What in the world is a "creator"?.
Second, have you viewed your thumbnails from your channel? They are supersmall, I can't read your title. This is what I see
View attachment 34086
I'll tell you how my experiences are: The song title is invisible for me. I can't make anything out of the blocks. The horizontal line with the black circle doesn't make sense for me. The fonts are good, sometimes the background is hard to see in contrast to the text. Sorry for the bashing, that's not my intention at all, I'm just sharing what I think. Most of the people go through this part of your channel, and this is also how it looks like in the search part of Youtube and in subscribers feed. About your video titles; if I were you I would start with the song title, then your music genre and then that's royalty free music. I feel the emphasis on Free Royalty Free Music is too much. The title also doesn't fit on the screen...
Hope it helps you, since you're making/using awesome music!