I like Snapchat, it encourages video communications really well. Of course many other platforms have video, but the fact that by default, there’s not going to be a saved log of you being dumb on video really gets people to engage. I know it’s possible to save snaps and other platforms have a ‘delete after’ option for video. But Snapchat just makes it so easy to send a dumb snap to a friend and really inconvenient for them to share it with someone you don’t want.