Libraries. You know, I had my music in iTunes but I got sick of it, so when I intalled win 7 I actually moved it all back into media player. Unfortunately, Moof doesn't recognize these files. I know this is about as relevant as catering to the Zune market, and moof did say 'itunes' on the tin, so no harm no foul. Pity though.
Eh...the search is not that good. It seems like you're just searching Youtube? I opened up YT in another tab and then did the same searches, got [edit: many of] the same results. but clicking on a result in Moof would often take me to the wrong entry - ie a different video in the same search results.
So I'd click on 'Kate Bush hounds of love TOTP' and instead the video that would actually play would be 'Kate bush hounds of love JBU talent show', although it would still be labeled as the former.
Sorry, that's really broken. Scribble 'Alpha' on it somewhere and solicit more testing is my advice. I wasn't willing to send time finding out whether it could process my mp3 library or not.