I recall reading that some localities have already made changes to their body camera recording rules which rule video footage inadmissible if it has been edited to remove context.
Sorry, I was a little unclear in that post and probably made it sound more legal (as in, courtroom) than I intended. What I meant is that some police departments have announced that they will not allow edited or out-of-context footage from body cams by police officers facing administrative action. You're right in that courtroom rules of evidence are not subject to such decrees.