@tosen the only other media plugin I know which is compatible with BuddyPress and which allows media (photo, video, audio) uploads via post update box in Activity Stream is the premium BP Gallery plugin http://buddydev.com/plugins/bp-gallery/
There’s a free media plugin https://wordpress.org/plugins/buddypress-media/ I haven’t used this plugin so do check if it allows uploads from Activity Stream post update box and which is free and which upload is PRO/premium version.
The plugin https://wordpress.org/plugins/buddypress-media/ (now known as rtMedia) will also provide you with uploading of media files on the activity stream.
RTMedia looks like it’s going to be the best solution, but it still doesn’t work properly on my site. I keep testing it at each update, but so far, no luck… 🙁