What IT conferences are there and where can I get their materials?

Question

linux

Good day.
Tell me what are the IT conferences (Russian-language) materials of which can be found, that is, where the organizers themselves bother to shoot video reports and make them freely available.
Particularly interested in conferences dedicated to the administration of Linux, WEB servers, topics related to QA and monitoring systems
I only know about HighLoad ++

Answer 1

https://events.yandex.ru
https://it.mail.ru
You can see it here.