The original police report about the incident tells all about the argument, Jones' threats that he was going to "kill all y'all in here," Jones saying he was going to get his gun and the shooting that followed. The police also said someone in Jones' entourage was involved in the shooting. All of that was reported in the media when it happened. So the three guys who were shot at saying Jones was responsible isn't really anything new.
The only new information would be from the informant -- someone presumably other than the targets, possibly in Jones' entourage and maybe even the shooter -- who told the police that Jones arranged the shooting. But that wasn't shown in this portion of the report.
The disturbing part of that video is the report that Jerry said the Cowboys didn't know about the incident AT ALL, which would be proof of our complete incompetence if true. It was all over the news when it happened. It was in all of the papers, it was on ESPN, it was discussed all across the Internet, including here. And nobody from the Cowboys had ever heard about it? That would be utterly ridiculous.