Bloc vidéo : mise en forme "bouton" (#833)

assets/js/theme/blocks/videos.js

assets/js/theme/design-system/Lightbox.js

assets/js/theme/utils/a11y.js

assets/sass/_theme/blocks/video.sass

assets/sass/_theme/components/lightbox.sass

assets/sass/_theme/configuration/icons.sass

assets/sass/_theme/design-system/lazy-player.sass

assets/sass/_theme/design-system/video.sass

assets/sass/_theme/hugo-osuny.sass

i18n/en.yml

i18n/fr.yml

i18n/pt.yml

layouts/partials/blocks/templates/video.html

layouts/partials/commons/lightbox/lightbox.html

static/assets/fonts/fonticons/IconFont.ttf

static/assets/fonts/fonticons/IconFont.woff

static/assets/fonts/fonticons/IconFont.woff2

static/assets/fonts/remixicon/remixicon.eot

static/assets/fonts/remixicon/remixicon.svg

static/assets/fonts/remixicon/remixicon.ttf