Zelda II: The Adventure of Link is quite different from most of the early games in the Legend of Zelda series. It combines an overworld view with side-scrolling platform stages. In addition, the character can gain experience and levels, visit towns, and earn spells and items which are needed to proceed.
Arc and Inzult improve the previous movie by 3 minutes and 39.71 seconds, thanks to a newly discovered glitch. Read the authors' comments for details. For a "warpless" run, see NES Zelda II: The Adventure of Link "warpless" by Arc, FatRatKnight, Inzult & Rising Tempest in 45:26.04. For a run that abuses the warp glitch, see NES Zelda II: The Adventure of Link "warp glitch" by TASeditor, Arc, Inzult & EZGames69 in 05:31.89.
You can watch the complete run being played back on a console.