Coolant a hydrophobic inert silicone, kinematic viscosity of 5-200 mm
Not that I understand what that means.
as the website is in Russian, either use google chrome to translate or look at
(57) in the document which is the Abstract:
http://www.fips.ru/cdfi/fips.dll/ru?ty=29&docid=181944&ki=PM states the liquid is
hydrophobic inert silicone as a coolant liquid with a kinematic viscosity of 5-200 mm at a temperature of 25 ° C with the addition of antistatic additives 
Wow, you are a great investigator, nevertheless, there were some right answers about coolant in comments downside the video. I will have to reward the first one who gave the right answer there. But thank you for participation.