To transcode the video, yes. I could also download the created webm directly but twitter for example is very restrictive about video formats. The webm won't work there. On linkedin it actually would work directly.
https://clips.fm - A tool that converts podcast audio to shareable & social media ready videos.
The video creation and the transcoding is all done in the browser, so it was quite a technical challenge. It's far from perfect, but it works and it's improving every day.
That story seems more or less to be a myth, too. And there seems to be a good reason why they used from pencils, which they used in the beginning to pens:
"Pencils may not have been the best choice anyway. The tips flaked and broke off, drifting in microgravity where they could potentially harm an astronaut or equipment. And pencils are flammable--a quality NASA wanted to avoid in onboard objects after the Apollo 1 fire."