Alexh, if you want to question the practicality of some hardware, you will have a lot more to do on amiga.org I think

I am sure redrumloa has some reasons for using it, be it curiosity, nostalgia or whatever, and I can definitely identify with that. It's an old amiga playing fullspeed video at a decent quality, and that's awesome in itself, even if the task is considered trivial and even archaic by modern standards.
Remember, most things you can do with an amiga you can still do better and faster on a PC.