Add playable videos to multimedia container

![screen shot 2014-08-08 at 15 44 30](https://cloud.githubusercontent.com/assets/1001642/3858089/a757331e-1f0a-11e4-9ed9-f626c1e3bd46.png)

![screen shot 2014-08-08 at 15 44 38](https://cloud.githubusercontent.com/assets/1001642/3858090/a95fe750-1f0a-11e4-9f2e-3a6f0d42dc32.png)

![screen shot 2014-08-08 at 15 44 54](https://cloud.githubusercontent.com/assets/1001642/3858091/aacea93c-1f0a-11e4-98cf-83df093fd2c8.png)