hello there! I started my channel as a photography/vlog channel, but that soon morphed into a “horror” type of channel along with vlogs. I’m super interested in if my thumbnails are working. I put a lot of effort into them but I’m not sure if they’re doing the jobs. Also how’s my Usage of YouTube’s SEO and how could I make it better? Most of my videos around around 5 or so minutes, I know the average video now is like 10 minutes should I aim for that? Thank you! All criticism is welcomed and appreciated!