how to embed YouTube videos in BuddyPress (Social)

Hello,

I am trying to embed youtube videos in my BuddyPress TEST site.

I use latest versions of BuddyPress Social and WP single-user site.

Installed the oEmbed WP plugin.

Problem being: it displays not correct, see here:

http://www.jazzguitarmasterclass.com/forum/activity/

Also, when I click on VIEW, it doesn't display correctly either:
then the YT video displays in correct dimensions, BUT OVERLAPS the sidebar to the right, which looks unprofessional.

I didn't seem to find much info searching here and Google re letting users EMBED YOUTUBE VIDEOS INTO BUDDYPRESS.

Any pointers?

Thanks!

Falk