Excellent idea to track livingstreaming of violent/illegal acts. Would be interested in staying in touch with anyone who wants to do this.
i track anti-Q/8chan articles & put out a report every 2 months, mostly recently on VOAT for Sept 1. (b4 I found this site). Voat link: https://voat.co/v/QRV/3408544
Since many anons can't access this, here is the key links you need to access article database that definitely includes material on other sites that livestream shootings.
Will post the cumulative report thru Oct 31 2019 the first week of Nov on QRB (QResearch Bunker) on 8qun.net if it is up or here if it is down. It also gets posted on Information Warfare thread in QRB.