Old Youtube App for iPhone 4?

So instead of updating my iPhone to ios 6 I decided to keep it at ios 5. I did this so I could keep the old YouTube App and I would not lose all my favorites (I had many). I couldn't transfer all of them to my youtube account because when I tried it would just transfer some. I go on today and none of the favorites are there. I tried turning it off and on again and they're still not there. What to do?

Transfer? The YouTube app in the App Store is official from Google and as such when you log in everything will be the same. Favorites, likes, comments etc. No transferring necessary.
First time I've heard of an issue like this

You need to sing in into your Youtube (google) account.