Fortunately, the Marvel Studios Twitter page included it in its rundown today of the MCU’s many (but not all) mid/post-credits scenes.
Alas, if you’ve been wanting to watch a high definition version of Goose coughing up the Tesseract, you’ll need to keep waiting.
Since we’re still a few months off from Captain Marvel being released on Blu-ray, DVD and Digital HD, the only way one could have watched the movie’s mid and post-credits scenes is either see it in theaters again or find a bootlegged recording online.