Server freezes

When I play on any server my game freezes and I hate it.I do have an old monitor and pc I don't know if that's the case. I do have evidence (a YouTube video) https://youtu.be/M6X3TpshOXs if you go to 1:09 my game freezes and it happens every single time.*Note*it doesn't effect single player and also its 1.12.2 and under for the versions.