Hope it doesn’t get damaged trying to start it too soon: it will need an oil and fluid change/flush/rebuild too.
Hope no underground critters/underground humidity (mold/mildew) have damaged it either.
Having working on cars for the last 35yrs that would be a biggie. From what I can tell by watching the video it looks like they sealed it up to keep the critters out. If moisture got in? All bets are off. Talk about rust. OH MAN,it could be bad. It would be like putting a potroast in a crock pot and let it simmer all day!
Now if it stayed water tight and dry I would love to be there to see it dug up. All you would have to do is add antifreeze,oil,gas (not the stuff buried with it),and a battery and it should fire right up. Someone here said the tires and weather strip would be bad. Not soo IF the container stayed dry.