tutorial videos
This was simply not a huge thing back then. Remember that the only way for most people to experience on-demand video back then was via VHS and the TV, and most households only had one TV that was presumably being used to play the game. To watch a tutorial video, you would have had to watch it on TV at a specific time, or you would have had to buy or rent said guide, stop your game, connect your VHS, and watch it. I can find references to game guide videos people sold in magazines, but these don't seem to have been very popular. Most people just read the manual, which isn't that crazy of a concept. All games before video games came with rule books so why shouldn't these?