For knowledge sharing in a remote team (been working 6y remotely), we do lot of videos sharing called Snackchat and Impromptus Knowledge Screencasts [1].

When there is a question, we give the answer, but also try to give the more context as possible , with a link to a document or slack conversation.

[1] https://erickhun.com/posts/sharing-knowledge-in-a-remote-tea...