In we added a shortcut for muting the sound and refactored the code to be functional programming. Now the "muting" key "m" and play/pause key "k" is toggled from within the interaction when typing answers and similar.
1. Ensure that none of the keyboard shortcuts for the video can be triggered when answering the interactions.
2. Refactor the function to have keydown in the name so that it's easier to find for other web developers.
3. Fix missing this reference inside keydown handler/callback.