Thanks for uploading, I'd meant to review this after the race but didn't get a chance!
So I'm the Porsche #36 in question in the first incident and essentially I got the jump on the car ahead of me when the lights went green. Unfortunately a car was coming up on my right and I didn't think I'd room to my left so I had to lift slightly which caught the car following me by surprise and resulted in the incident.
Obviously looking at this slowed down and from heli cam my lift looks much more dramatic than it was, but it was probably a bad choice! I probably did have room to move to the left of the car in front, but again hard to judge that from the cockpit. I also didn't want to be dive-bombing the inside into T1!
One additional thing is that start widget was completely new to me and I found it very distracting! My view of the car in front was obscured by something flashing at me to watch my speed so I when the lights turned green and it disappeared I'd no idea where I was in relation to the start line which I assume you're not meant to pass before.
Would be good to get your feedback @Riccow on what I could do better next time! Lifting at a start is clearly a recipe for disaster but the other alternatives didn't look so good either!
I will add that although I found the widget a bit distracting, I loved the full rolling start. Really ups the excitement levels and is an important part of the race. Hopefully they can tweak the implementation a bit!