well for once, make the game footage shorter for those games, not a lot of people will watch a 30min video for 8 or so odd games.
also, transition between the clips and the captions what those games are, their features, platform, release date, developer and so on would really help, since there are already hundreds or thousands of channels doing the exact same thing, so you have to have something that elevates your channel out of that pool of channels with similar concepts.

If it was ID claimed then those who claimed it likely monetized the video and put ads on it. It's also a good thing to check and see if the music and sound effects you're using are under a Creative common license (in other words, FREE USE) as other licenses such as the Attribution license they will likely claim that video in a heartbeat despite it being a small indie channel. I also agree with others on shorter videos, it really helps for keeping a viewer's attention when they don't know the content, or if it is longer than segment the video or as cowlikesapricot says put timestamps either in the beginning of the video, in the description, maybe top of the comments, etc.

Good luck with your channel!

no problem! :)

Sorry, I didn't mean YouTube ads but the videos of the products you edited together. I don't think putting text over them is enough to avoid a copyright claim, but I'm not a lawyer. :)