GoPro - Original 1280x960 resolution

This is the YouTube video (on the left) with  yt:crop=16:9  added to the tag field. Compared to the original video (on the right), you can see that parts of the YouTube version are cut off.

This is the YouTube video (on the left) with  yt:stretch=16:9  added to the tag field. Compared to the original video (on the right), you can see that parts of the YouTube version are stretched. For example, Ben's body (red shirt) is wider than the original.