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Slack's also always had interesting onboarding/product explanations. Here's a landing page with that famous sandwich explainer video that explains the product in context.
https://web.archive.org/web/20150514162713/https://slack.com/
Obviously Slack is a way more linear tool and the video feels sort of lame now but interesting to remember there was a time when slack was novel and wasn't obvious to explain.
@internetvin was doing some exploration with video (of a very different kind) that might be an interesting way forward.
Here's another slack example that is pretty similar to the existing FL landing page. Find it cool that they use the tool within the context of different projects like landing rovers on Mars etc.