I would want to know what broke this camshaft in the first place... I also question if this repaired cam is still indexed "timed" correctly.. ... among other concerns....
This is a fake repair! The camshaft was newer broken, it was cut in two pieces by a gas cutting torch, just for youtube. The young craftsman is a very clever guy in using his turning lathe, but it is not possible to make it perfectly straight with this simple machine this way. And he didnt consider the timing of cams before welding together the parts