What ASL? The driver was stopped at an ordinary pedestrian crossing, IMO, because he couldn't stop behind the vehicle in front without impeding the crossing. The OP was going to turn right at a roundabout - no ASL. The OP stopped, clearly checked to see if the driver was waiting for a pedestrian, saw that there wasn't and set off. He did this at the same time the cars in the LH lane were also setting off as did the car.
My apologies if you are confused....
The post you refer to is in two parts:
The first is the quote from a previous post emphasising the point to which I am replying:
There is some pedantry somewhere that might suggest you are required to use the cycle lane (if exists) to enter the ASL as not to cross the first solid line.
The second part was a clear reply clarifying the the point raised and quoted:
Yep - the first line is the "Stop" line, and crossing it whilst the lights are red is strictly "failing to stop". Entering via a feeder lane is how cycles are exempted from this.
Not quite sure how this got interpreted as referring to an ASL in the video though