Everyone uses youtube to see his favorite videos. Most of the time, you need to subscribe to a certain user’s feed using RSS. Unfortunately, the 'Subscribe' buttons subscribes using their own notification system, and you have to be a member to subscribe.

Contrary to popular beliefs, youtube provides RSS feeds, but they are hidden. You can subscribe to a user's feed using

http://gdata.youtube.com/feeds/base/users/mtayseer/uploads

And to a certain tag using

http://gdata.youtube.com/feeds/base/videos/-/egypt

The question is: why did they hide this?