There is a lot of fun little short films on YouTube and some of my favorite horror short films are made by Fewdio.com. The short films (the longest film they have on YouTube is 12 minutes) have a raw, visceral feel to them. Even the short ones have stiff shots of horror in fun little packages. Below are movies that running about 2-4 minutes a piece, but trust me there are a more then a few chills here.
Check out more Fewdio movies at their YouTube channel and visit their website at www.fewdio.com.