I actually didn't spend much time on the mix, and don't think it's that great, I was really all into in the mindset of "let's take the guitar, throw a mix, record videos, and be done with it" because otherwise I would spend like days trying to edit the shit of everything, learn deep functions of the video editor etc. So I just took my guitar (with already-used stringed, but you should never do it if this is serious) then I just recorded them in a few takes (until it sounded good for at least 3 or 4 riffs), same with bass, programmed the drums (actually not well programmed, just humanized with the reaper humanize function).
Then guitars are LexTac if iirc, with the infamous s-prehigh impulse. in Orange channel, not red or lear or anything, it's actually just a good crunch, not a hard disto. bass is as usual split into a lowend track and a clank/grit track, I used a guitar amp on top of the bass amp sound to make it grit the way I waneted, and then compressed like hell by Rvox/1176/LA2A or something like that, drums are Metal Machine, except the snare is the LSD original series 3 or something like that (the 3rd in the list) for 60% of the sound and the 40% other is the snare from Metal Machine (I think I used the 2nd snare in its list). (I'm not too sure about the snares but basically the MM snare sounded a bit aggressive and high pitched for this mix so I mixed an LSD snare with more body). I used parallel compression on the drums, and used the kick as an input to compress the bass whenever it kicks in.
I think it's just all down to tape emulation (MPX) and console emulation (VCC 4k for most of it + neve for guitars or something like that). I just makes a tremendous difference and makes it easier to mix. Just put on the track and nothing else.
I just mixed it in 2 hours, helping myself with Ermz' guide as a starting point. I "premastered" it with the built-it "jlooser limiter" pluging inside reaper (it doesn't even have a GUI- because that's all I have atm
for loudness and the SSL comp of course before that.