> no need to take ... action, but still have a reasonable apprehension 
I would say so yes. I suggest that "reasonable apprehension" is a fair way short of certainty. If you consider two boats that are in fact on courses that will bring them within a very few inches of each other there is no actual need to take action, but at a reasonable distance there will be an entirely reasonable apprehension that a collision may occur, and a prudent sailor may take avoiding action anyway.

Incidentally, isn't this a scenario where communication between boats, while not compulsory, is advisable? If Give Way hails ROW to say they are well aware of the situation, propose to keep clear etc, the apprehension on the part of ROW will be much less than if Give Way is ignoring all hails and staring at the far horizon.

I am a big believer in online official notice boards.
During covid, when we could sail, we did not want the crush of compeitors by a physical notice board.
We got used to the new systems, and began to prefer them.
It is ok saying the internet may go down, as an outsider at a club, geting access to a printer is difficultt at international wvents you canot bring your own printer, you cam only write so much in a given time.
I do events run from multiple cluds, a crew member had to be dispatched, to check for prptrsy scedule and si changes.
Now all are online generaly, and notifications are given by e mail.
In multi class regattas just posting all the protest time limits was a majour task, now managed from the pc.
Same for hearing schedules, not to aay the ease of the notices then a commirtee is protesting.
Lang live the electronic sysstems.
Do however specify the online system as the official notice board,.
Get the link from rrs post about the venus the qr codes.

And it did a superb event at the Fastnet Schools this weekend - well done! 

I have looked at the vidio you highlighted again.
This to meis not like my comments on the single trigger. 
I have no problem with leaning on the boom to move to weather, nor bearing away after. 

The rock, which clearly seems to gain speed, worries me. 

Doing it more than once as shown, is repeated, and i think i would flag a foul. 

Hey Mike .. just a bump-reminder to give us your thoughts. - Ang