bp doesn’t allow you to embed YouTube by default.
However, if you are talking about blog side, then something must be happening, like plugin confliction, etc. on wpmu side.
Well, how can I embed a video in my blog post? Could Intense Debate be creating a problem? That’s about the only plugin on my new site that I’ve never used on the old WP installations … ?
I deactivated IntenseDebate and still the same problem. Are BP people averse to embedding videos? 
Sorry to bump, but has anyone dealt with this, or does anyone have a solution? I’d be pretty heartbroken to find that I’d spent weeks developing a huge site only to find that a basic functional element such as YouTube video embedding would not work … surely there is an answer! Pleeez!
bp has nothing to do with this.
try unfilteredmu plugin.
Does anyone have a reliable plugin that they’re using for MU, then? I have searched the MU forum for information and the postings that deal with this issue are really old, sometimes as old as two years. I’d be eternally grateful if someone could just say, “Hey, this one works great for me,” so I can be on my way!
TIA!
unfilteredmu is developed by Automatic, what could be more reliable than that!? 
