Unhappy 360 (At idle)

A good motor doesnt have that amount of blow by.

Thing needs to be gone through.
Pcv looks new.
Noisy in the video, cracked ring sounding..chattery
Cracked or seeping gasket between cylinders is a common one too... puts lil heat spider cracked in the head when the combustion passes into the next cyl.

BUT.. to not jump head first into the more obvious issues shown by the blow by... try a spray bottle of water, mist around the carb and are if it cleans up a bit.
Those tiny primaries seem to make a lot of vac noise in the vid, a lot, so you may have a vac leak.