big buttons, no menu, autoplay yt, fix sizing

...ations/0312_alter_districtarticlepage_content_and_more.py

...ons/migrations/0069_alter_electionsarticlepage_content.py

...migrations/0152_alter_mainarticlepage_content_and_more.py

shared/blocks/parents/button.py

...ates/styleguide2/includes/atoms/buttons/round_button.html

...tyleguide2/includes/atoms/buttons/round_button_block.html

...yleguide2/includes/atoms/youtube_video/youtube_video.html

...mplates/styleguide2/includes/organisms/layout/navbar.html

...grations/0125_alter_uniwebarticlepage_content_and_more.py