Thanks to piano-playing cats and finger-biting children, video-sharing websites like Vimeo and YouTube can be a total time-suck filled with mindless entertainment. But in between the fluff, you’ll find an endless wealth of inspiration. World leaders, innovative artists, and just regular Joe Schmoes have harnessed the power of the Internet video to share ideas that can change the world, or at least our attitudes. So before you hit play on the latest clip making the rounds, check out these seven short videos that are sure to get you motivated to do a little bit more.