Do what you feel it's your channel, I started with game videos too - couple of them still there
was fun but many games are stressful & there's a lot of competition. I like nature/outdoors/activity so decided to change channel name & topic to videography which allows for plenty of travel (mostly local)
Thumbnail designs are a plus, long videos are probably a negative but you can edit out many empty/useless parts easily cutting video length by half or even more making it easier to watch since many ppl can't devote as much time to one platform(youtube)
if this is what you like then keep going, I would just improve thumbnails & shorten videos leaving only the juicy/memorable/important parts