Meh, one must take all those publications that he bases it on with a huge grain of salt. There was a campaign to demonize and even ban kratom that was led by Trump's guy Gottlieb, through the standard revolving-door-between-big-pharma-and-FDA channels. So, Gobblieb was trying to demonize kratom as dangerous, even though there were only like 1-2 cases of death, and they were actually all due to other substances the individual happened to be taking in addition to kratom. There was no case in which kratom alone was a cause of death, regardless of amount ingested. At any rate, while Gottlieb was claiming that kratom was dangerous, he was still on the board of Glaxo-Smith-Kline which, you guessed it, had a patent on a crystalized / synthesized form of the active ingredients in kratom and had created studies indicating it was "safe and effective" as a pain reliever. Gottlieb stood to make millions if they could get kratom outlawed and this drug took off.
kratom is an effective pain reliever, and for individuals who may have issues with purity, for instance, the lowering of libido (if it's true) could actually be a very positive thing. It's extremely helpful as a pain reliever without the terrible side effects of straight opiates, and also very effective against anxiety. Some individuals attest to kratom relieving pain that couldn't be touched by the normal mind-altering opioids.
If people want to take kratom for any of these reasons, they should get regular blood work done, including testing their hormone levels, to see how it effects THEM.
If you look up the main study cited by the guy in the video, it's totally and 100% anecdotal and based on ONE GUY ... where there were no other controls in place, etc. to determine if kratom directly or indirectly had anything to do with his issues. Other studies indicate that kratom does NOT lower testosterone levels, and some kratom users report increases in libido.
But all these scientific studies need to be taken with not a grain but a huge mound of salt, since everyone has an agenda. These studies are paid for by individuals seeking a particular outcome.
If someone thinks they could benefit from kratom in various ways, they should get some testing done to see if it may be affecting them in other ways, but I wouldn't make any decisions based on garbage "scientific" studies ... or otherwise I would have gotten the jab long ago.