Don’t do as the guy in the video does in starting your Yong Heng (at least) and tighten your “bleed screws” BEFORE starting motor!
Instead, after ensuring all is set make sure both pressure release screws are OPEN, then turn power on, first close the first stage/water moisture purge screw tightly (too light and pump will fill slowly), then close second stage screw tightly.
When time comes to shut the pump down, first open second stage high pressure screw, then open first stage screw and allow moisture to fully purge with motor running, then turn power off.
In other words never start the pump with either screw tightened down. It does not like being started nor shut down under load.