Hi there @alejandromata!
Mine is only less than 2minutes video and believe me or not, it took me half day to make that video. And it is not a one take video, its actually 5takes before I finally have the one I uploaded.
You can start by making a script (this is what I did). Then read it in front of a mirror hundred times. Until I have the guts to record myself.
As I've said, it took me half day to make one..but atleast I tried. And finally make it. :)
Goodluck to yours!