To watch videos with translated subtitles / closed captions embedded on microbit.org or support.microbit.org, you can do so by opening the video player settings and changing the language.
1. Click on the subtitles/closed captions button in the YouTube play bar to toggle subtitles on or off.
2. Click on the cog wheel in the YouTube play bar and either select your language if it's available or choose Auto-translate.
3. Chose your language and view the video with the machine-translated subtitles.
If you find that you do not have the option to auto-translate the video in your browser, click on the YouTube link in the player, to view the video on the YouTube site. Here you will be able to repeat steps 2 and 3 to view the video in your chosen language.