Yes, there are a lot available:
-Videos Plugin for elgg 1.8
Arvixe/Elgg Community Liaison
I'm pretty satisfied with Izap-videos. It's a good choice if you need on server videos (instead of embedding from Youtube although it has that capability too) with user uploads. It can be tricky to get the config right though and will probably take some effort.
For monetizing the Ad Rotator plugin should help. It allows you to put banners or other HTML in your header, footer, and/or sidebars.
Ok thank you for your advice.But I forgot to mention that it was for version 1.7.15 elgg. thanks.
No friends yet.