Some variations of the Sicilian Dragon.
If I were to make the video again, I'd make two changes: 1) At 5:26, I say "Black will have to capture." There is another possibility, as some commenters have pointed out. Black can just make another move instead of capturing white's dark squared bishop, IF white moves its bishop to h6. If white captures black's bishop on the next move, black can recapture it with its king. However, this is not part of the video. It is a situation that could arise if white moves its bishop to h6.
2) At 5:53, instead of saying "... the fianchettoed bishop is always stronger..." I would say "... is in some cases stronger..."
