BuddyPress.org

Hmm… interesting. I’ll have to make note of this for my own needs as well!

Anyway, you don’t have to hack the kses.php file, you could use an mu-plugin like Embed Allower:

http://github.com/ceefour/embed_allower/blob/160f179357835bfb6eda26952ed972f674c19365/embed_allower.php

Or Allow Embedded Videos:

http://wpmudev.org/project/Allow-Embedded-Videos