I test this link on samples of Vitamio and Exoplayer(both of samples written by main developers)
Exoplayer play it so faster. Furthermore Exoplayer samples have controller and better samples. I test both of them with other link and the result is the same; I going to use Exoplayer. according to this video from google I/O Exoplayer performance is very good. apps like youtube and lynda.com use exoplayer too. I think exoplayer is easier to use. you can ask your question on issues page of exoplayer in github site; actually Exoplayer sample is better for using and undestanding