Perhaps there should be a setting for videos, like NSFW that applies to region-blocked videos.

I suggest:
-Users & uploaders can invoke whether a video is region-blocking (*region)
-The video will show up as unavailable to the user (greyed out?)

I don't know how often I've loaded a video only to think my computer is screwed up or sit through a few commercials to find out it's blocking the content. I'd definitely love to filter these duds out from my list, and would be willing to *tag/categorise them as *region blocking to save others the waste of time.