What you need to do first is to get rid of all the credits remaining in your videos. You can either find creditless opening on the internet or just not use them. Your video must be clear of everything looking like subtitles or watermarks etc.
Next is about the legitimity of your editing, I mean it's fine to make a video look like an opening but if you only use opening scenes to begin with, it really looks cheap, almost like you didn't put any effort in that one. I can't say your editing was too bad here but then again it looks so much like an opening that I can't really feel too bothered by unconsistent cuts and what not... So yeahh first of all, use clean sources.
Good luck with your next work