I clicked the link in your post. After dismissing a few annoying popups, & as you can see below, Firefox blocking some as well, I finally got to the point where I could press the play button in the video viewer. Curiously, for some reason, that didn't actually make the video play in the web page. No matter. I was going to stop it after a couple of seconds anyway. After I did hit play, this is what I saw:
I downloaded the first variant listed on that VDH menu. Here's what the download looked like part way through, as reported by the VDH blue dot status menu:
The download completed in about 3 minutes. The file was about 324M & looked like this:
That 1912x1088 resolution is a mystery I have not figured out. VDH gives me bogus resolution numbers like this on almost every download I do. When I played the file in VLC, the VLC video information reported this was in fact 1920x1080. And I did play the file in VLC. It looked fine, although those video bit rates are quite low. I didn't sit & watch it, just sampled it at intervals. There was audio & video at each of my sample points, about every minute. I let it play the last few seconds to make sure it was all there & indeed, the credits were there at the end.
I'm running Windows 7 64-bit, Firefox 111.0 64-bit, licensed VDH 7.6.5a3 beta (same as 7.6.6), CoApp 1.6.3, VLC 3.0.18 Vetinari. Maybe Firefox handles the page better than Edge. I can only speculate. Clearly, it worked fine for me.