2022
Silantiev - Common Errors of Beginners of 10:47
    https://www.youtube.com/watch?v=--Lk0IFT2Zk
2020
Zhdanov - 5 Classic Errors
    https://www.youtube.com/watch?v=Xc-2QFB12dc
    https://www.youtube.com/watch?v=KtCE7tsg_cM
2018
Veniamin - Why do we Faill Striking High Balls
    https://www.youtube.com/watch?v=X7orQ3vy3Gw
Veniamin - 2 main errors
    https://www.youtube.com/watch?v=_ONP73JvSSg
Pletnev - Errors of Beginners
    https://www.youtube.com/watch?v=tsKViO2sNHI
2017
Veniamin - System Erorr
    https://www.youtube.com/watch?v=gQ6HQbiH-8w
    !!! need to pay attention to speed as well !