On April 1, 2015 Facebook rolled out Riff, a collaborative tool to make videos with friends. The idea is that you make a video, give it a topic and share it with a friend and they can add to the video.
The friends can then share it with their friends on Facebook and their friends can add to the video. A small video can become a large project between friends. One person starts it and sends it to a group of friends and it runs from there.
Social media, creativity, friends collaborating and having fun, you cannot get more interactive and social. Who knows, the next Indie Film Winner may be discovered!