Well looking at that still image, it appears that that cycle lane is of a decent size and has double yellows. Looks like the safest place for a cyclist to be in that case as it allows people to pass safely. If I saw someone cycling out of the cycle lane in that situation I’d think they’re being foolish. Taking a greater risk than necessary and causing an obstruction.

Is someone not being in the cycle lane an excuse for road rage? Of course not. There’s no excuse for road rage.