fwiw in Firefox on my old Android phone I saw the same choppiness watching it in page but downloading & watching it locally it was smooth. On very fast WiFi &

fwiw in Firefox on my old Android phone I saw the same choppiness watching it in page but downloading & watching it locally it was smooth. On very fast WiFi & the video is only 2MB so I can only presume something in the page is competing for device perf.