But watching youtube for your decompression doesn't get you to a well rested state. It can do the opposite. So you aren't making any progress toward actually getting free time.

Better decompression. Turn off all networking. Read something for 5 minutes and go for a walk. Successful decompression in 10 minutes, not 10 hours.

Whether intentional or not, or just progressive improvement on algorithms, youtube thrives by providing a need, and then providing it poorly so you keep your watch time going forever. This is a fun feature of machine learning. Non-willfull conspiracies. A system can do something malicious to get ahead that is equivalent to a highly calculated malicious action, while no one, including the model itself or the algorithms that trained it, or the people who trained it, understands what it's doing.