Study tips

(x)
MOV (Source) 1280 x 720 83.03 MB
FLV (Flash) 640 x 360 6.66 MB
FLV (FlashHD) 1280 x 720 15.69 MB
MP4 (480p) 640 x 360 4.77 MB
MP4 (720p) 1280 x 720 16.38 MB