Best bet is upload to a host like YouTube or Vimeo, then link here.
Hah! I make my living writing and designing instruction documents that are subject to intense scrutiny before they are published, so there is always the paradox: “Is it really worth all this effort to prefect something when it’s possible no one will read it?”
In my case, the answer is easy because the instructions I write are for installation of electro-mechanical devices, so there are many safety and liability concerns in the mix.