[Asraelite]

I often like videos simply because it's impossible to leave out crucial information; everything is shown.

Text guides will often skip steps because they assume the reader will know what to do.

[hammyhavoc]

Wikis by their very nature allow for people to catch these problems and let people know where there's shortcomings.

As anybody can just hit record on a video and log the entire thing, having a reference video for a process is easy enough, as is turning a video into a transcript automatically that can then be embellished upon. Screenshots can also be taken from videos if there's something visual that may be lost in text.