There's quite a few comments disagreeing with his actions. Since his actions consist of recording breaking the law to have the law enforced, I'm curious if those commenters will argue that the law is bad, or whether enforcing the law is bad.
(The option "both options good but him doing it bad" is indeed absent)
I think that laws are at a certain degree "elastic" and texting while completely stuck in a jam is not the same as texting while you are moving. So, snitching on that it's closer to being a "vigilante" than filming drivers who are actually being dangerous to cyclists, which it's something I would totally justify and even do (the filming, I mean).
It's akin to a red light camera being used to spot drivers making an illegal right turn on a red light versus drivers who recklessly run through a red light. The latter is known to cause serious accidents, the former not so much.
A right turn on red light could still run over a pedestrian quite easily. Texting while in a jam will just add delay when the jam unlocks. If you keep texting after, then it's a different story (and you are moving).
(The option "both options good but him doing it bad" is indeed absent)