We also have GitLab Unfiltered, where you'll find some tutorials, recordings of sync meetings, etc. https://www.youtube.com/playlist?list=PL05JrBw4t0Kq7QUX-Ux5f...
We have an Efficiency sub-value called 'Write Things Down' which helps to explain this: https://about.gitlab.com/handbook/values/#write-things-down
Video has some pros (extra visual context, more engaging, more human) and cons (longer to consume, harder to search, typically creates double work having to record + document textually). Each company will likely view mediums slightly differently.