If the 20 ton processor can do 20 tons per shift instead of per day, that's awesome and may be true. We may be mistaken.
I think people have just been using 20 tons per day to be conservative with numbers. Even only 20 tons per day, 3 shifts of employees, the cost per barrel seems to come out to be extremely cheap.
I don't recall that being reported, if you have a link to confirm it I'd appreciate it. The stat that I have heard is 1 liter is produced from 1 kg of plastic. That would make the numbers reported correct. Again, things need to be clarified.
You also indicated down time was not part of the total listed, you are wrong, the number posted, is based on 25% down time to clean the machine, again, very conservative. 40,000 barrels/year at $80/barrel = $3,200,000/year/processor.
Regarding the video you posted. It has no bearing on JBI. JBI are now making a 30 ton machine, that can take even more plastic per hour but again, that isn't relevant either. The video didn't report how much fuel per hour and how much waste, which seems to be a lot. It's a damn large machine by the way. Cost of the machine was not reported as well.