I get a kick out of YouTube's not fully understanding older D&D editions...
"They thought people played 24x7" because of the long-rest mechanic in Amber Temple.
No. The thought was because it was multiple sessions, you had to track used spells, hp, etc. across the sessions.
Because that was hard when most character sheets were pieces of notebook paper, resetting everything was easier. This also meant they could balance every encounter to be more difficult - versus having to account for needing resources at the climax.
The "no encounters" is because usually a DM would roll random encounters if the PCs attempt to sleep or recover resources.
It literally was to deal with the rules calling for encounter checks if the party does a rest/recovery cycle - which would often take several days of game time.
And yes - the Amber Temple mechanic is where the concept of a long rest restoring all hit points and spells came from, and yes, it predates video games.
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