24 seconds in tells me all I need to know were the vid shows 1000VDC 750VAC but earlier in the vid you can see where the wires from the probes attach to the unit it says 500VAC MAX, I wouldn't touch this POS with a barge pole and I certainly wouldn't be trusting the CAT rating either.
Might be a nice toy if your work only requires measuring low voltages but nah, not for me.