There is no rule for emergency vessels on water
In the situation described in the video the Coast Guard was burdened and was requires by the rules to alter course (usually to pass astern) to avoid the other vessel. The right of way vessel is required to hold course and speed so as to not confuse or otherwise hinder the burdened vessel in keeping clear.This crossing situation occurs quite often with ferries trying to keep schedules, where they are burdened and wish to pass ahead of a privileged vessel. In that case, the ferry sounds two blasts (instead of the traditional one) and if hearing two blasts in return, may proceed to pass ahead. If the privileged vessel answers only one blast, or none, the situation is one of crossed signals, and both are required to stop until the situation is resolved.It would not appear that the CG gave any signals that were responded to, and the speedboat, whether looking or not, did what they were supposed to do. It appears that the CG did not.Joe S