A great med? Really? What's in it?
I watched the vid, and quite frankly I'm at a loss as to why anyone would force a hypo down a fishes throat. WTF was he thinking?
What one should be doing is adding a small soft tubing to the hypo, and gently sliding that down the fishes esophagus and into its stomach. No DVM in his right mind would administer a drug like that.
Secondly, as previously stated hexamita (Spironucleus) & "worms" are two entirely different things, that require completely different medications for successful treatment. That vid was titled "Deworming a Flowerhorn with Clear".
The person in the vid then goes on to describe (incorrectly) how to use that med for deworming, for hernias (?), and for hexamita. It sounds to me like a broad spectrum drug, just as CLOUT is, and while getting it directly into the fishes gut may be the most effective treatment for a fish with hexamita, the safety margin with an unknown drug from Bangkok that can somehow treat everything & anything in my books would be pretty much zero.
There are FAR easier, FAR less stressful to the fish, and overall FAR safer ways to deworm a fish - and you do NOT need to deworm a fish once a month as stated in that video.
Here's an article on how to deworm a fish by a real DVM, from the U of Florida.
http://edis.ifas.ufl.edu/fa091
As far as prolapsed rectums, which the person in the video was I think describing as hernias, I have successfully treated with a simple epsom salt bath. As far as that goes, there have been a number of people here on MFK that simply force fed their FH epsom soaked pellets for a few days & they recovered from a spironucleus infestation.
Here's an example of what I managed to do with a very sickly FH and epsom salts.
http://www.monsterfishkeepers.com/forums/showthread.php?436561-Red-Diamond-from-Zero-to-Hero
If the fish has a bacterial infection epsom salts isn't going to help, but on the other hand I think it's better to start safely than to simply cram a hypo full of god only knows what kind of mix of meds down into a fishes gut. Especially meds that come out of Thailand, where hormone laced food & fish medications are under almost zero scrutiny from the Govt.
Caveat Emptor