I've watched this several times the last few years. The first 3 times was to try and keep up with the first speaker's speed-talking!!

I used some of the information to debate the aftermath decisions one should make if encountering the police, especially if you've shot someone.
The very first LE person you need to be weary of is the 911 operator. They ask a long string of questions, partly to give to the responding units so they know what's going on, and partly for the record.
I think you should call 911, ask for help (police & ambulance), and leave the line open. Answer factual questions (name, location, nature of injuries), but then just stop talking. You're being recorded. Saying "I killed him" won't help you when the 911 recording is played in court.
If you are calling 911 DURING the attack, leave the phone connected to the 911 operator so they can listen/record. It'll back up your version of events better than a witness.
So nobody in Hawaii needs to watch this.

I have many non-resident, non-Hawaii permits. This is good info for traveling and carrying. It's also good advise for any other law enforcement interview.