If you don't already, you may want to check out
OBS for editing. It allows you to do picture in picture so you can film the video separate from the narration. If you want to do a blue screen setup, you can do that as well. without a solid blue or green background, the overlay will look not-so-good.
Editing is key.
If you can set up the camera while you work, then do a picture in picture narration may be a good idea.
"Here I am pressure washing a block before I take it down to the machine shop..." You will get more views wearing a white tank top, but people will take you more SERIOUSLY wearing a shop coat and safety glasses. Your call.
"Here you see me checking ring gap in the cylinders. Note how I have the top ring about an inch down in the cylinder and how the ring is square to the deck while I check gap with a feeler gauge..." explaining the entire process of squaring the rings with a piston prior to gapping, et cetera.
@Dartswinger70 was right, keep the videos to about 10 minutes. Too short and people won't want to watch either because they'll just feel cheated.
You may want to write an outline with bullet points on 3x5 cards for presentation, it helps you remember what points you want to hit. I know I ALWAYS forget things if I don't make notes. This is something that you may want to do, especially if you are doing a picture within picture narration.
Anton Petrov is a very good example of a format that works well.
Isaac Arthur can pull off the 30 minute plus videos, and he has a speech impediment. Watch and time the individual cuts in his videos.
David Vizard has some good videos, but his intros are annoying as hell, avoid that crap.
Growling Sidewinder If you want to put in any background music, be very subtle with it, check out several of these videos. You may have to search around because not all of them have an after action review. Note the piano has
no other instruments supporting it. In this video, the background music is probably a little too loud. You can play with the volumes of the tracks with OBS.
Garand Thumb is a good one to watch. His presentation is very direct. Note his posture, it helps when presenting. He speaks with his diaphragm rather than with his chest muscles.
Razorfist is another good one with his editing. His high energy intros and ending credits work with his presentation style.
In any case, Awesome to see.
Now, I want to see Candy Girl.
Get her running!
