Videos disappeared on iOS devices since Match!

I subscribed to Match yesterday, and although there are various hiccups (which I won't mention here) one thing is really confusing me, and that is the disappearing Music Videos.

I had around 50 music videos showing up perfectly in the Videos app on both iPhone and iPad. Since Match, not only have the videos gone from local storage (have to download from Cloud only) but some have disappeared completely.

As an example, I have the Lady Gaga album 'The Fame Monster Videos' in my iTunes library. It consists of 7 videos which all also resided on my iPhone and iPad. Now, only 1 appears at all - in the Videos app downloadable from iCloud - and the others don't appear anywhere at all. Gone!

Other videos appear in Music (under their original audio album), but most go to Videos.

What is going on here?