Historical clue formulations

• Musical ending of many a YouTube video — 2023-04-12
• Musical bit that slowly fades — 2022-10-19
• Closing section — 2022-07-10
• The one in "Layla" lasts 3 minutes 48 seconds — 2022-05-27
• Closing bit of music — 2022-05-09
• Closing bit of music — 2017-09-02