The demos really are .fvf fractal video files, they really are! Its amazing TMMI actually has their VDK3 fractal video compressor (a derivative of VDK2.1) running. Its humorous to see those still in denial try to convince themselves otherwise. No million dollar plus IBM PVS super computer required. ftp://ftp.tmmi.us/
TRUDEF™ VDK3 Fractal Video Codec for AMD64 hardware
A derivative of VDK2.1 originally licensed from Iterated Systems Inc.
TRUDEF_IRIS32FREE_A001_C039_1010D_2k.fvf 509817 KB
TRUDEF_IRIS32FREE_A001_C039_1010D_4k.fvf 1977676 KB
TRUDEF_IRIS32FREE_A003_C042_2k.fvf 333321 KB
TRUDEF_IRIS32FREE_A003_C042_4k.fvf 1387521 KB
TRUDEF_IRIS32FREE_A026_C054_0910H_2k_60fps.fvf 1190736 KB
TRUDEF_IRIS32FREE_A026_C054_0910H_4k_60fps.fvf 4513470 KB
TRUDEF_IRIS32FREE_H054_C034_03141M_2k.fvf 777368 KB
TRUDEF_IRIS32FREE_H054_C034_03141M_4k.fvf 2930445 KB
"TOTAL MULTIMEDIA's TRUDEF™ Fractal Video Codec for AMD64 hardware was developed for high bitrate CPU based decoding. TRUDEF™ has been upgraded from VDK2.1 originally licensed from Iterated Systems Inc. in 1994 to an improved VDK3 code base using Microsoft Visual Studio 2017 for Windows 10-64, and provides near lossless quality 8K playback on 2019 commodity hardware."
It appears you will have to wait for the new player:
"The TRUDEF™ VDK3 Fractal Decoder is currently being ported to TMMI's new UWP compliant TRUDEF™ Video Player, replacing the original TRUDEF™ Fractal Video Player developed in 2012/13."