More about the need for a decent youtube app in Facebook...

Sooo... I continued my little research on Facebook and there seems to be only two apps that allow you to quickly see your friends favorite YouTube videos:
- "YouTube Box", and
- "YouTube Video Box"
Both these apps are unofficial and not sponsored by YouTube. They seem to be UGC... and after taking a look at the functions of "YouTube Video Box", I am pretty disappointed. The App is not user friendly, not all that popular, and it does not allow viewing an aggregate best video ranking among one's friends...
Why would youtube not make a decent app for facebook? I guess youtube is afraid of loosing traffic in their own website...