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YouTube - Always Theater Mode

Set the default viewing mode to Theater Mode.

These are versions of this script where the code was updated. Show all versions.

  • v1.4.4 10.11.2023.

    Update to detect Theater Mode due to new YouTube changes.
  • v1.4.3 09.04.2022.

    Bump timeout from 200ms to 500ms to ensure video is fully loaded before triggering theater mode.
  • v1.4.2 17.09.2021.
  • v1.4.2 17.09.2021.

    Add a small timeout before attempting to hit the Theater Mode button. Fixes issues with current YouTube.
  • v1.4.1 28.07.2018. Support new YouTube changes as of July 2018.
  • v1.4.0 11.09.2017.
  • v1.4.0 11.09.2017. Use YouTube's SPF API to detect when a video is loaded. Even meaner and leaner than before!
  • v1.3.5 31.08.2017. For 2017 redesign, do not toggle theater mode off if it is already on.
  • v1.3.4 31.08.2017. Support new YouTube design for 2017.
  • v1.3.3 23.07.2016. Even leaner and meaner than before!
  • v1.3.2 15.01.2016. Update script to coincide with latest YouTube changes.
  • v1.3.2 15.01.2016. Update script to coincide with latest YouTube changes.
  • v1.3.1 04.08.2015. Leaner and meaner!
  • v1.3.0 07.07.2015. Disable SPF (Thanks Anon from YouTube Cinema Mode userscript). Split code into functions. Load DOM mods on document end.
  • v1.2.1 27.06.2015. Add support to expand HTML5 progress bar for new HTML5 player.
  • v1.2 27.06.2015. Fix HTML5 progress bar to expand to full-width.
  • v1.1 23.06.2015. Better support for HTML5 videos when using Tampermonkey.
  • v1 19.06.2015.