Just released a recent presentation I did. Here's the blurb :)
This introduction to OpenBIM, Native IFC, and Open Source AEC was given as a keynote speech at the CAAD Futures conference in 2021. CAAD Futures is a biannual international conference on computational architecture founded in 1985.
This introduction to Native IFC covers all the basic concepts, code, libraries, and tools to get started building your own Open Source AEC tools.
Some social media links :)
Edit: YouTube seems to have picked a fantastic photo of one of OpeningDesign's projects under construction. Kudos to the great work @theoryshaw is doing in pushing FOSS solutions in AEC.