Originally Posted By: artie505
A Simon's Cat fan film is the one (and I just duplicated my experience).

I've got Flip4Mac installed.

Edit: By the way... Sorry for omitting this info from my original post.

All i get from viewing that viddy is a "ytimg.com" cache (and TOC.plist was left bare), so perhaps Flip4Mac is convincing Safari that a plug-in should be displayed as well. ::shrug::