Actually it did not really compare the phones in any meaningful way.
For one thing, the brightness was cranked on the iPhone while the HTC was in powersaver mode (it's pretty obvious). Put them both at full brightness and you'll see the two displays are not really that different.
Plus, he should have done one more thing on the TB (which you cannot do on the iPhone). Double tap the text and it automatically resizes and reflows to the screen for easy reading (no need to scroll both side to side and up and down).
If they are going to go to all the effort of making videos, give more detail.