...BTW your Bieber avatar is awesome.-Malone
Just to be sure TDC with the cam at TDC? If you cannot tell then you have to take the VC off it will make a difference.
The pump timing needs to be verified.. But to me it sounds like a fueling issue. Also have you verified that the idle is set high enough to allow the engine to sustain combustion. With the idle set too low the engine will never fire off because there is not enough fuel being injected.
Your video reminds me of my car with a run down starting system, trying to get it to fire up the first time after priming the system. Weak turnover delays everything. It might just need that extra nudge to catch, run and purge all the air out since it sounds like its trying to catch. What about with the pedal down 1/3I recently found out just how bad my system was slipping. I got my battery checked and it was bad after a year, it would drain down after charge. Then I upgraded to bigger power/ground wires with extra grounds to starter and alternator. Then I got a tdi gear reduction starter from a nice guy here on the forum just in case and its like a whole different car. I actually started my car a couple times by accident cold with no glowplugs!I was working on it last week without running it much because I am having pump running issues and was able to crank it a ton over the course of the day and the batter read 65%, and it was still spinning the motor over constantly without being able to count the revolutions like that. So awesome upgrade in my opinion, it can make the difference in cold weather starting.On another note is your timing belt tensioned right?