For those of you that hate youtube (big tech) He has a Rumble Channel
here is the link to that video
https://rumble.com/vkjpit-chinese-armed-police-trained-cuban-black-berets-to-suppress-proteststalking.html
and his Rumble page
https://rumble.com/c/TalkingPointswithDavidZhang
Chinese trainers are likely from the The People’s Armed Police Counter Terrorism Units, or civil police responsible for internal order - used in HK.
In China, the PAP (is under the control of the Guoanbu and the CCP) has a division-sized mechanized infantry unit and a rapid deployment light motorized infantry unit. Depending on how much the CCP wants to loan to Cuba, they will likely set up similar sized units. Suppression will be total.
People have short memories. Several of the most brutal interrogators at the Hanoi Hilton were Communist Cubans.