Scopus is a multidisciplinary database that covers all fields of science and engineering as well as social sciences. It has nearly all of the content of PubMed as well as additional veterinary-related content not found in PubMed. The videos use general search topics, but the techniques shown can be adapted to any research topic.
Videos on PubMed will be created soon. In the meantime, have a look at the tutorials provided by the National Library of Medicine.