The RDA Toolkit YouTube channel has a lot to offer to RDA Toolkit subscribers and the RDA curious. There are recordings of presentations, introductions to new RDA concepts, and training videos for the redesigned Toolkit. The latest addition to the channel is a series of videos that provide guidance and tips on conducting searches in the beta site. The videos have been constructed and narrated by Kate James, an experienced cataloger who, in the role of RDA Examples Editor from 2013-19, was a key contributor to the redesign of RDA Toolkit.
The new videos include a longer overview of searching in the beta Toolkit and the following short videos.
These videos and other content on the Channel are well worth a look.