The links are having issues for me... but if you right click and open in a new tab or window it works fine for me.
Also a note about these two throws. They were on 400' and 300' holes and neither probably went more than 250'-275' I was using an archangel on the first one, and a teebird on the second. The teebird I got to turn over some and come back so it was in the higher range. I have stopped throwing the archangel though as I found the teebird or a monarch works way better in an open field for me although if I can put enough anhyzer on it my nuke works decently well now also (but still in the 275-310 range).
I'm no pro but have been playing for 7 years now and heres my take .
your balance seems off a little at the end of your drive on the second drive .
you seem to have a clean slow drive But your feet at the end seem not to be well planted and balance seems to throw the whole thing off.
Edit ... I have watched it about 15 times now and it may help to tighten up your x step your 2nd step seems to be throwing you off from being about to put you weight behind your drive .
Follow through! Let that left leg swing around to the front of your body after the disc leaves your hand. Looks like you're consciously trying to stop this from happening, making you almost lose your balance.
I definitely need to let that foot come around. I have been working on that. After watching this a few times does it look like my step after the X step is too long? I tend to do that so I can get a lower throw (doing this originally helped me bring my throws down by getting the nose down more somehow).