Youtube videos on Lightroom

Some of the best Lightroom tutorials are by Julieanne Kost  an Adobe "Evangelist". You will also find some of her guides on the Adobe web site, and she is party to all the latest developments in Adobe Lightroom and Photoshop.
https://www.youtube.com/@jkost

General collection of useful Adobe Lightroom tutorials
https://helpx.adobe.com/lightroom-cc/tutorials.html

"In a Lightroom minute" - 39 videos lasting 2 minutes or less, on specific features of Lightroom.  Some really interesting "quick guides" here.
https://www.youtube.com/playlist?list=PLmXfFxjdp3CE7bhyuWEmnUbcJuLtwfh30