SCoPE can actually display videos directly when attached to a forum post. I just flipped the switch to enable it and have been fiddling with different formats and file sizes. I notice the files with .wmv format take forever to load, but .mov files load just fine. I'll keep investigating.
I know what Penny means about posting videos publicly. While SCoPE is open to the public it is less likely that others will come across your videos here. I posted my video to the SCoPE group in Facebook but didn't know it would also show up on my own FB page. Minutes later I received a comment from my best friend from grade 2! And my sisters were all over it.
YouTube has a setting to make your movie private, but you still have access to the embed code to provide access from SCoPE. There's a restriction on how many times you can view private video but I'm not sure that applies when embedded.