You shouldn't have to worry about copyright, the film clip is public domain and I own the rights to everything else. It was fun to watch you playing (you worked out what the glasses were for way faster than most). As for where you did get stuck, I don't want to give too much away, I'll just say...bathroom.
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No worries. Quite frankly I completely understand about the copyright thing. Youtube has a really bad record when it comes to protecting creators from illegal copyright claims. (serious, check out their history with UMG, its appalling). I can completely understand wanting to play it safe.
Anyway, weird though it sounds out for context, enjoy your trip to the bathroom.