Next Space Rebels

Story related and unmissable. Takes just a few minutes: "Login", go to chat, get your first kit delivery and build a rocket. Press "Launch." Press left and right triggers to end recording and choose to upload it. On the next screen you just need to pick a "tag" for the video in order for the "Upload" button to work.

(Use two spaced out booster parts to make the rocket stable enough that it doesn't fall over, but I don't think that matters for the achievement.)