Thunderboly Video Questions

[HeavyArms504]

Ok guys, so i am a huge TV guy, favorite show being Spartacus, anyways long story short, I downloaded Spartacus Gods of the Arena, put it onto my TB and was ready for some prime time blood spillage. After downloading arcMedia to watch Avi files, when Watching the video, the sound was on point, but the video was choppy. Phone said try lowering resolution to get a better viewing experience. Can anyone inform me how to do this? in a very stupid dumbed down way hehe, kinda new to this whole android thing. Thanks in advance guys.