Here is the announcement of the initial release of YouTube Video Feed. YouTube Video Feed allows you to have your chosen video feed publish to the event feed. You can choose from:
Currently, tapping on one of the feed entries will take you to the mobile web page, from where you can play the video as per the usual method. I may add an option to play the video directly in the stock player.
Debian package is available from http://ubuntuone.com/6spoOcgz8LDoDdclujjtdB
Source Talk Maemo