In this case, the two are intrinsically connected. I get what you're saying. I also think "Cops are suing a teen for invasion of privacy based on his narration

In this case, the two are intrinsically connected. I get what you're saying. I also think "Cops are suing a teen for invasion of privacy based on his narration of a viral video of their body cam footage of his arrest" is a little unwieldy.