How big is the storage tank, in terms of volume? To me the one in the video looks too small. I would expect that co2 needs more space than the fuel (since oxygen is added). So a truck needs roughly 100 gallons of fuel for the distance you claim. I would be actually surprised if you can fit the co2 from that into a 400 gallon container (but chemistry is not my strong suit). Any comments?

Edit: I looked up some numbers. 1 gallon produces 9kg of co2, so 80% capture is around 7kg. Co2 has a density of 2g/l at 1 bar (0C). So at modest 200bar you have 0,4kg, so 1 gallon needs 7/0,4=17,5 litre, so 100 gallon 1750 litre=460gallons, and of course a 200 bar compressor.

Does that sound right to you?