I think you need to do the YouTube review all over again. You say you really really like it, yet it is not working properly for you in the video. The loading was way too long, some of the options did not work for you, and you did not show a video playing. Not sure what was wrong, maybe your WiFi connection? I would do it again though, after you get it working properly.
Your videos seem to overview the app then more review, you didn't mention negatives, positives, you didn't show alot. I guess as a rookie reviewer you learn as you go on.
Nice job mate! Now it's time probably to make an Overview/ Review on your Wi-Fi connection ?!?!?!!? Hahaha . . . Sorry for the sarcasm, I cannot help it mate . . . You are reviewing a Youtube app, but you didn't show a video playing, you didn't speak about the capabilities of the app (features) . . . Whatever, Peace . . .
Know how it is to how slow internet. Used to be in the same boat, try redoing the review at McDonald's or something.