Reddit user has release a video it sounds and appears to be in Russia based on the language shown in the UI. The reddit user who shared this video apparently had paid the leaker money in order to gain access to it. This video shows a back DualSense controller with the PS5 booting in the background.
As it is the case with all leaked videos, this one also needs to be taken with a grain of salt. It does resemble the short opening animation that Sony showcased for the PS5 during the Future of Gaming event.
If this is the case it is a very quick boot.