Legend of Zelda II glitched heavily.

Most of this run features Link racing across Hyrule so fast that the screen can't keep up, inexplicably warping between places that shouldn't be connected, and collecting just three items, one spell, and one sword technique needed to beat the final palace.

Dark Link, the final boss, takes the same amount of damage no matter what level attack you have. This is especially convenient for the author because he reaches Dark Link without ever leveling, or, indeed, even killing another monster.

This is a 29-second improvement to the author's previous movie due to a different route choice and better manipulation optimization. See the author's comments for details.

There is also additional audio commentary by the author available here.

PHOTOSENSITIVITY WARNING: Many moments in this game contain intense flashing lights, such as during the final boss fight and whenever the player dies. This may cause epileptic seizures to those affected.