Just today I finished watching Grandmaster Corner from the Calgary Chess Club via ZOOM ...

Today was the 4th in a series of 2+ hour zoom-based chess presentations by different Grandmasters. They have been extremely interesting and very informal. The content varies even within a single presentation so that inexperienced players and very strong players alike will find interesting insights and ideas. There is usually a question-and-answer session after the 2h presentation where the GM fields questions about chess: books, preparation, history etc. All very informative and gaining in popularity. More information can be found here:

=======> http://www.calgarychess.com/blog?category=gmc#content

in addition, one can email Steve Sklenka here: president@calgarychess.com with questions.

I can highly recommend this reasonably priced high-value series of lectures.