I thought the detailed step-by-step instructions on how to install a ScreenPAC and solder in each of the wires was pretty amazing to document in a video like this.
Keep in mind, this was from an era where the pause button on a video recorder was pretty poor... So using this for step by step instructions then would have been challenging.
Also, I loved the way they completely mangled the keyboard connector with heavy tools as the "recommended" way to replace it, rather than desoldering it.
Watching this video was very nostalgic. I didn't expect to find missing instructions in there either - the name of the video gives away nothing.