Hi Anna,
I should have been more clear - I used gochukaru - the Korean chile powder - and probably less than 1 cup - about 6 tbsp (I err on the spicy side). I have not put eggs in it yet, just gobbled it up on bread / naan :). It is hot, but bearable.
LE: I also used 4 tbsp of 1:1 garlic-ginger paste, 1.5 tsp kosher salt and 1 tbsp sugar, which may not be exactly the quantities shown in the video. YMMV