it's probs bile, which is greeny-yellow
when it doesn't have time to uh, season in the gut but rather passes through your digestive tract too quickly, it comes out green on the other end
common with really bad runs, but if it goes on for too much longer def see a doc
for now, drink lots of agua and pick up some pedialyte to rebalance your electrolytes
in terms of monetization, I'm sure there are still quite a few german sites around who would be happy to buy your footage
