Fictional fixture: reliable notes
https://www.youtube.com/watch?v=demoVID0001
Status: complete

[00:00] This fictional lesson explains caching. Save captions before requesting a summary.
[00:10] A retry should reuse completed work. The speaker claims this can reduce duplicate requests.
[00:20] A timestamp links a note to its source. Review evidence before relying on a claim.
[00:30] The example resource is Python at https://www.python.org/.
