'via Blog this'
You can get RSS feed by username, something like this:
http://gdata.youtube.com/feeds/base/users/<username>/newsubscriptionvideos
Example:
http://gdata.youtube.com/feeds/base/users/google/newsubscriptionvideos
.How to get Youtube username:
- Go to youtube.com
- Click on the arrow next to your username at the top right of the screen.
- Click Channel under My Account.
- Enter the username you'd like by typing it into the text field provided.
- Click Next.
- Choose your privacy settings from the options provided.
- Click All Done!