John,If you watch the video and listen to what was said it was this was a short-cut,a way to weld aluminum at home without the need to invest in some special aluminum only special welding equipment.
Is it the correct thing to do ? of course not but this way, the only "special" thing that's needed is a new spool of wire.That's it,that's a really short list if you ask me.This video was never intended to be the best way to weld aluminum or to be the correct way to weld something.That guy isn't even in the welding field any more.He's a video guy who used to work with a welding company when he was much younger.He decided to try this short cut that an old timer had told him about and then tape it.So that other people who have something aluminum they need to weld and don't have or can't afford at the time,the right equipment can see if this short cut would work for them.I'm glad he made the video and I'm going to try it out first chance I get.
I will say it again,this was not intended to be the correct welding procedure for aluminum,if you're looking for that correct procedure then find another video.
BUT if someone doesn't own a TIG or have a MIG that will power a spool gun and wants to try welding some aluminum stuff at home with the MIG welder that they already own,then watch the video and try it out for yourself.
I did watch the vid. I donít normally watch YouTube vids on welding because I am a welder. 90% of the vids out there are wrong, thatís why I donít watch them. I donít need to try this out, I already have a tig. Was certified on aluminum for missile and aircraft. Most of my welding career, peoples lives depended on my skill as a welder.
If youíre just fooling around to see if it works, or doing something artistic, go for it. But if youíre trying to do anything that will see stress, not the proper way at all.
There are shortcuts to welding, but filler choice is not among them. Filler choice is paramount, and will literally make or break a weld.
Just pointing out that this method will get you hurt or possibly killed if used in the wrong situation. Iíve seen guys lay down dimes with minimal, if any, penetration and thought they did good. If youíre not going to do it right, either donít do it or find someone who can. Hell, ship it to me, Iíll do it.
Good luck with this, let us know how it turns out.