1) Replace cover image with your own, stock images are meh...
2) titles - make it more fancyer (in short, make it more appealing to people and search engines)
3) thumbnails - make it custom, not just screen from video
4) maybe a bit longer description and more social media links if you have it (like facebook or twitter)
Wait... I think we're in the wrong forum.
Yo Sequan, just a hint for next time I think this goes in "YouTube Chat, Gossip, & Help". this sub forum is for literal suggestions for this particular website.