FYI, in newer version of UE, not only is the command NetEmulation.PktLag as mentioned in the lecture, but there is no “=” sign either:
NetEmulation.PktLag 1000
Basically, the Net command was changed to NetEmulation.PktLag, and the parameter was changed from PktLag=1000 to 1000
Keeping the “=” will yield a Command not recognized: NetEmulation.PktLag=1000 in the output log.