Thats like saying its the victims fault he got robbed by being in a bad neighborhood, not the guys who robbed him. The victim should have known better.
Second degree murder is an unlawful killing without premeditated planning or reflection. That could easily apply here. Manslaughter might sell as a plea agreement.
Okay, but surely he should know that this situation is entirely different. That was coercion to obtain a confession. In this scenario, there is no question as to who did what. If guilt is determined it will be perfectly clear where the responsibility lies.
If this is as it appears, the guy in the trailing car would be an abject idiot for tying his own proverbial noose to hang himself, and his own buddies, by releasing the video.