Overleaf have made all their webinars, available on demand.
Worth checking out if you want to know what you can with overleaf and how to make the most of it.
- Featured Webinar: Intro to Overleaf Part I - Beginner Features
- Intro to Overleaf Pt.II - Intermediate
- Intro to Overleaf Pt.III - Advanced
- Teaching with Overleaf
- Effective Collaboration with Overleaf
Hope this helps.