I didn't listen to the video because to be honest I don't want to hear some emo chick rant and rave.
But if there is a genuine suicide threat in the video Google will notify the appropriate authorities. The police can get a court order and the IP information in a few hours. Understand, however, that notifying the authorities may be meaningless effort. The IP of the address might not reveal anything as it could have been uploaded via a public connection, through a VPN, etc.
You've done your part which is to flag the video. Let other people do their part.