Recent vids of possible interest:

The Complete Picture with Julieanne Kost: Selective Coloring Techniques in Lightroom
In this Episode of the Complete Picture Julieanne Kost explains two different methods for selectively colorizing an image to differentiate the subject from the background using Adobe Camera Raw.

Creative Suite Podcast: Photographers – 5 Lightroom Keyboard Shortcuts that will Speed up your Workflow
In this episode I’ll show you 5+ Lightroom Keyboard shortcuts that will definitely speed up your day-to-day Lightroom workflow!