Ok. The video was great. I switched my volt meter and turns out im only drawing .07 at the moment, which sounds like an acceptable range on that video. So back to square one of why. Through the course of rebuilding my engine and trying different things on the way I've killed this relatively new battery multiple times (2.5 years old). Wonder if it's just good enough to test well but really be on the outs. There has been a couple times, but rarely where I came home and my rear lights stayed on and I couldn't turn them off. Maybe that happened last night, all I know is it sucks having a cool car at a restaurant and having to do the walk of shame cause it won't start. Lol. Was getting confident too that I was finally starting to get everything dialed in and then this again.
Each time you "kill" a battery, you shorten its life.
What happens is the battery plates will become covered in lead sulphate every time it's discharged. Get it below 90% and it starts getting bad. Below 80% and you only have to do it about a dozen times and it's toast.
In normal operation, the sulphate burns off as the battery is charged, but when it's deeply discharged, the sulphate buildup is too much to burn off.
So, a 2 1/2 year old battery that's been discharged a bunch of times is not going to be what I would call a good battery. The guy at AutoZone that flipped burgers at his last job might have checked that battery and it's fine to spin over some 4 cylinder popcorn wagon import, but it might not be enough to turn over a real engine when it's hot (or cold if it's below zero LOL)
IIRC, you've got a bunch of electronic stuff, like maybe EFI and some stereo amps etc. going too. That adds some draws (memory) and is probably why you have the .07 amp draw with everything off. The video is really aimed at newer cars... I would bet that my car draws nothing (especially now the clock stop working) and there will always be a slight draw with a newer car's electronics.
BTW, cheapest place I've found to buy a battery is Costco.
So... If your electronics let you, a battery disconnect might be in order. I have one on both my cars and when they are parked for any extended period, the battery gets disconnected.