Very good. Yes, "protest" is the required hail that does not appear in this video. Given that I'm the skipper of the starboard tack boat, my not hailing "protest" is a pretty good indicator that no rules were broken.

I posted the video because I thought it would be good to see an encounter where the boats did everything right. The first port boat tacked about as close as it could and still keep clear (about 1 foot separation). At the time, I believed that I held course. The video, however, does show a little tiller movement, but not enough to constitute "avoiding action". The second port boat tacked far enough to windward, and steered wide enough around the mark for me to round and gybe cleanly.

Regarding the rules and the hails made, that is a bit of a gray area. None of them are explicitly mentioned by any rule, but there is an argument that rule 14 "Avoiding Contact" implicitly requires them. Not all judges agree, but Dick Rose (former chair of the ISAF Rules Committee) repeatedly wrote that hailing is a "reasonable action" to avoid contact. If a right-of-way boat does not hail, and if a hail could have prevented contact, then the boat does break rule 14. By that logic, the two hails of "starboard" were required by the rules.

Whether they were required or not, I still think that hailing is a good idea. When boats inform each other of their intentions, they can be prepared. Surprise maneuvers are much more likely to cause contact. The hails of "I need room" and "I'll give you room" are examples of good communication between boats. Both skippers knew what the other was planning, and knew what they needed to do.

I'll prepare a "part 2" video that covers the details of the applicable rules and the obligations of each boat.

I hope that was helpful,
Eric