If the liability issues for injury or death were that great with this item, HF wouldn't even have this on the market! Out of 84 critiques, 94% would recommend it, 52 people give it a 5 star rating, and 22 people like it for it's durability says a lot more then your generic made up false statement! Nice try on your attempt to slander HF, FAIL!
I have used a different one on a smaller scale, lifted only about 2 feet. For things like brake jobs, shocks, and whatnot, they our a blessing to have, no more crawling on concrete with no room underneath the vehicle. Oil changes, U-joint jobs and such, they aren't real great as the lift gets in your way.
I didn't watch the video so I don't know what safety things they've installed from preventing collapses, but the unit I used to use did have a safety feature to prevent it from falling. I would have to venture to say that I'm sure all types of lifts now days have some type of safety feature to prevent accidents or they wouldn't be on the market!! I hope this helps?