[John James Jacoby]

My unofficial opinion (which is subject to change at any point) is that it’s a great idea if you and your audience are okay with you not hosting that data on your server.

I’m selfish, so I like to have control over everything so I can take responsibility for it if I break it. I also like to be able to dive right in and fix a problem if something happens instead of making a telephone call or sending an email.

At the end of the day BuddyPress will have its own media management eventually, and BP developers can choose to use the built in one, or something like Kaltura. It’s the same as outsourcing your comments or forums to another service. If you trust the provider and it does what you need, then there’s no reason not to use it.