Can't figure out why 1/3 data usage on iPhone is for video?

If your phone browsers are displaying "desktop" webpages rather than "mobile" webpages you are streaming video data with every ad in motion and flash display. If you are connecting your phone to a laptop you are streaming even more and not realizing it.

Bottom line is does it matter? Are you being charged extra for this or are you using up high speed bandwidth to a level that you will be throttled by Verizon to a slow internet speed on the phones? If not, it should not really matter if you use x% of data on video.