Czechpoint made these videos for UK vz. 59 MG
https://www.youtube.com/watch?v=CNWnZYUsLl0
Disassembly
https://www.youtube.com/watch?v=gr75ydiXlzA
Range time
https://www.youtube.com/watch?v=c2cta4S-Emk
From: Czechpoint via The Firearm Blog