Hi, i have an iphone 5 that has sooooo much trouble streaming youtube since its 720p. My internet is 21 mbps down and any computer or laptop can load the entire video super quick at 720p or even 1080p but my iphone needs to buffer every couple of seconds for just 720p. Ive used different youtube apps but that didnt help at all. Is there anything I can do that would fix this problem? Thanks for any help