I'm with the commenter: when my first (or within 15 minute) impression of a vendor or product is craptastic I cut my losses and consider myself lucky for dodging a longer term bullet.
The commenter was actually very considerate and raised a warning where it might be seen. And they were kind enough to attempt this with two different browsers. After that you can buy my troubleshooting time at its usual hourly rate.
(Because it's a frequent enough issue: I wouldn't see that warning as being about a one-off obscure bug that will affect few people and doesn't matter. It's a warning that the web site probably did not enough take compatibility in consideration - and was approved without such consideration.)
"Runs fine for me" is an absurd bar for reliability / compatibility, no?
I can assure your this was a strong consideration of ours and all assets underwent a very strict regime. There is definitely more than other types of website but it's in the median of other robots websites with significants amount of videos.
Not to say I dismiss the comment, definitely looking at it cause it might come from somewhere else. Just that I yet don't see what is the bottleneck.