Strongly recommended · for some experience
EEVblog #1129 - Creating a Nice Readable Schematic
Why people recommend it
The usual reply when someone posts a messy schematic, it teaches layout and flow conventions that one commenter says match practice across several employers.
Watch for: Fairly long; the main ideas are worth more than every minute
In their words
I recently watched this video by EEVblog on drawing schematics.
user205112 on electronics.stackexchange.com, Dec 2018. CC BY-SA.
Dave from the EEVBlog ran into a "crappy" schematic one day so he decided to make a video to show how that schematic could be improved.
Bimpelrekkie on electronics.stackexchange.com, May 2019. CC BY-SA.