Heading changes suggested!
As the word "popular" has positive connotations and the videos often relate to tragic events, perhaps "most popular video" would be more accurately headed "most-watched video."
Also, the headlines that mention a tragic event and end in "what we know" should perhaps end in "early reports indicate" as far too frequently what is supposedly known turns out to be inaccurate or incomplete. The public has a right to know, but not to be misled or misinformed.
Last, please consider a style change from "automobile accident" to "vehicle crash."
JanYyyyyyyyok about
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