First off, let's state the obvious! Of course i'm bound to have IR Pollution issues without using a proper 'IR Cut Filter'. But the point of this video is to show that even basic ND Filters that are not advertised with IR Cut can all perform differently, so it's better to test out your filters with specific cameras before heading out to shoot a full project.
I've used my Tiffen Static ND Filters happily on many of my cameras without issues. It's a nice sharp image. But as the BlackMagic Design Ursa Mini 4.6K is more sensitive to IR Pollution this (non-IR Cut) Tiffen ND 1.2 is probably the worst ND Filter you can use with the Ursa Mini 4.6K or other IR Sensitive cameras.
Again, I know none of these filters are advertised as IR Cut and you could probably spend a good amount of money on some special filters. But in this case, the URSA Mini 'without' a filter doesn't seem too bad so you may get away without one. And the LCW Fader ND MKII (though not advertised as IR cut) seems to handle IR Pollution extremely well, so it's a variable ND I can highly recommend. You can find the LCW Fader ND MKII Variable ND via B&H (click here).