You can help your friends in Unity by transcribing Martha's talk. Transcribing the talk lets others follow Martha's lesson. It also exposes her message to the Google search engine so that the talk becomes indexed and searchable. Finally, it lets listeners easily find the segment they are looking for.
If you can do this, email Mark to let him know that you are transcribing the talk and send the transcription to him in the body of an email. Send to firstname.lastname@example.org