The
video mentions dehydrating
sourdough starter and I have recently revived some
milk kefir grains that had been dehydrated for several years. They turned a dark yellow when they were dehydrated but are still active.
Anne, the pickled eggs in the video are preserved in pickling lime, not the hard boiled and pickled in vinegar eggs that can be eaten straight out of the jar that you may be thinking of.
There is a southern Chinese (Cantonese) custom of preserving eggs in a salty brine. The egg yolks become firm and are often found in moon cakes in the centre of a sweet red bean or lotus seed paste.
The salted eggs can also be boiled or steamed over rice cooked by the immersion method, beaten and combined with minced pork that is seasoned and steamed and served as a side dish.