Saw thisl video yesterday... not a personal report, but I HAVE had the same thing happen / have had a hammerhead eat a smaller blacktip I was fighting, but my gear (including boat) were MUCH more modest and my fight lasted all of about 15 seconds.
Have to add, drone footage of the bite in video is pretty darn cool. Definitely has me itching to get back out to our area saltwaters here in the next few weeks as temps warm up enough to bring my favorite targets (cobia and kingfish) back into our local waters.