Video Quality Settings

[sdatish]

Can someone explain each of the video quality settings:

HD 720p (1280x720)
Widescreen (800x480)
High (640x480)
Low (320x240)
MMS(176x144)
Online (HD, 10 minutes
Online (High, 10 minutes)

Thanks.

 

[lowpage]

The video is the reason I bought my HTC Inspire from LowPage.com (Best Free Classifieds) but I noticed that some have a etter res than others ...I dont know why