Aaah, I think I know what's going on! Looks like a very bad overload, close to a short, and the fuse glows for a brief period of time before it blows (it does, right at the end of the video). The resistive wire is probably the load, not what's inside the fuse!
I've been told that these fuses can change as they age and should be replaced every 15 years or something - maybe that's why this one actually starts to glow before it blows?
BTW, the language is Czech. Not that understanding Czech would help much, they don't really talk a lot.
