[wizzledonker]

If you watch a little further until about 20 minutes what follows is an explanation of what the primaries represent (described by you as “colorspace coordinates”) along with a reasonable simplification of what a transfer function is, describing it as part of the colorspace. I believe that’s reasonable? He merely explains Rec. 2100 as if using the PQ transfer function is innate. Definitely all seems appropriate and well presented for the target audience.

[dcrazy]

I wasn’t able to resume watching, but if he never describes HLG I would call that a miss for his stated goal.

I don’t want to criticize too much, though. Like I said I’ve only watched 15 minutes, and IIRC this is also the guy who convinced a lot of cinematographers that digital was finally good enough.

[ikatson]

The author has a FAQ related to the video and he expands on "Why don’t you mention HLG in the demo" in it https://www.yedlin.net/HDR_Demo_FAQ.html