Does the verge app use the phone's built in video player?

The reason why I ask is that on my SGSIIE4GT the video player is choppy and always the lowest quality possible with no options for a better video. It was the same on my Nexus 7 until I upgraded and now it's a better player (still no quality options) but for whatever reason it automatically takes the video into full screen and refuses to go back to the app. This means each and every time I view a video on the Verge app I must force quit it in order to continue viewing.

Also, is there a reason why the youtube imbedded videos in the Verge app don't have an option to open in youtube?