You might enjoy watching Rob's Beyond the Scanlines - https://www.youtube.com/@BeyondTheScanlines

He looks at what he terms "interesting" games (old and new) across all retro plaforms, but does have a fair bit of Atari stuff in there. Always discovering new games through him.

Adrians Digital Basement! Lots of retro machines of all flavours, some Atari.

How is 8-bit Show and Tell not on this list?!?