The same delay all the time?
What are the sources of the video?
As a matter of fact I can't remember seeing this before - not that it helps you
but it means that I have to dig a bit
In the mean time you have to tell us more facts.
The minimum is exactly which Mint you have (Edition, version)
We also need to know a bit about all your hardware.
Run " lspci " in a terminal and post here (To copy from a terminal right click)
Some wifi and possibly built in sound can be connected to USB even if they are internal - if you suspect you have one of these run " lsusb " in a terminal.