Thats a bit of a Compendium of Cobblers, Mr S.
As far as I can tell the first one, and the NZ motorcycle are claiming to run on water alone. You either do that until your battery runs down (if its electrolysis) or you've got a perpetual motion machine.
I'm not sure its necessary or useful to watch VERY poor quality, mis-spelled video's of people demonstrating perpetual motion machines.
Can't we just wait for the Nobel prize ceremony/explosion of the universe?
Or we could skip the movie and wait till the paper comes out in Nature.
Whichever comes first.
The third one might just be a water injection system. I like them, and I don't think its necessary to be mad or bad to promote one, though apparently drinking the tail pipe condensate from an engine that is still basically burning petrol has to make you wonder.
A "Brown's Gas" flame makes radiation disappear by "transmutation". Huzzah!, nuclear waste disposal solved!
It couldn't have just gone up the chimney, could it? Where would be the magic in that?
After all that bollocks I'm afraid I didn't have much patience to try and decipher the jerky video of the exhaust system you were interested in, though it seemed pretty much like the acetone bubbler in your first post.
I don't get this "implosion" thing, though it seems to be part of the "Browns Gas" jive, presumably because oxyhydrogen is a "self-annihilating" gaseous fuel so after its exploded the final volume of the water condensate will be relatively negligible and a vacuum would be created.
You'd have to get rid of the heat PDQ, though, and anyway, its still basically an old-fashioned IC engine explosion.
But where's the magic in that?
One wonders whether these people have considered maybe NOT posting a video, but instead writing it up [EDIT: (OK, the spelling might be a problem, but they could get help)], taking some measurements, drawing some diagrams.
Maybe even filing some patents.
Maybe even coming up with some hypotheses and testing them.
Maybe even submitting to independent examination and testing.
(If the scientific establishment didn't want to know, the electronic media could sponsor it, Mythbusters stylee. It'd be entertaining TV, and a win for them either way)
Maybe even NOT bullshitting.
We reach for the sky. Neither does civilisation.
(Incidentally, if the search button is your friend, you must have some bloody useless, dysfunctional friends)