Been searching for the API to embed a Youtube channel\'s user_uploads for channels which have the new channel_id (starting with UC) instead of a user n
Never seen such a username. Do you have a link to a user (youtube website) with such a username ?
Update.
It looks like it is a part of the new V3 api from youtube and I filed a bug report at the youtube dev forum since it wont't work withe the user_uploads iframe
http://code.google.com/p/gdata-issues/issues/detail?id=6463
For example this channel
https://www.youtube.com/channel/UCpAOGs57EWRvOPXQhnYHpow
then ID is UCpAOGs57EWRvOPXQhnYHpow
Now try to load this
http://www.youtube.com/embed/?listType=user_uploads&list=UCpAOGs57EWRvOPXQhnYHpow
This isn't working, Only with real usernames
The posted answer does not work anymore.
Now you should use:
http://www.youtube.com/embed/videoseries?list=USERID
And the USERID is your youtube user id with 'UU' appended.
For example, if your user id is TlQ5niAIDsLdEHpQKQsupg then you should put UUTlQ5niAIDsLdEHpQKQsupg.
If you only have the channel id (which you can find in your channel URL) then just replace the first two characters (UC) with UU.
So in the end you would have an URL like this:
http://www.youtube.com/embed/videoseries?list=UCTlQ5niAIDsLdEHpQKQsupg
BTW. you can append &index=1 to specify which video should be played.
See answer on duplicate