wikijs/client/js/components/editor-video.js

const videoRules = {
	'youtube': new RegExp(/(?:(?:youtu\.be\/|v\/|vi\/|u\/\w\/|embed\/)|(?:(?:watch)?\?v(?:i)?=|\&v(?:i)?=))([^#\&\?]*).*/, 'i'),
	'vimeo': new RegExp(/vimeo.com\/(?:channels\/(?:\w+\/)?|groups\/(?:[^\/]*)\/videos\/|album\/(?:\d+)\/video\/|)(\d+)(?:$|\/|\?)/, 'i'),
	'dailymotion': new RegExp(/(?:dailymotion\.com(?:\/embed)?(?:\/video|\/hub)|dai\.ly)\/([0-9a-z]+)(?:[\-_0-9a-zA-Z]+(?:#video=)?([a-z0-9]+)?)?/, 'i')
};

// Vue Video instance

let vueVideo = new Vue({
	el: '#modal-editor-video',
	data: {
		link: ''
	},
	methods: {
		open: (ev) => {
			$('#modal-editor-video').addClass('is-active');
			$('#modal-editor-video input').focus();
		},
		cancel: (ev) => {
			mdeModalOpenState = false;
			$('#modal-editor-video').removeClass('is-active');
			vueVideo.link = '';
		},
		insertVideo: (ev) => {

			if(mde.codemirror.doc.somethingSelected()) {
				mde.codemirror.execCommand('singleSelection');
			}

			// Guess video type

			let videoType = _.findKey(videoRules, (vr) => {
				return vr.test(vueVideo.link);
			});
			if(_.isNil(videoType)) {
				videoType = 'video';
			}

			// Insert video tag

			let videoText = '[video](' + vueVideo.link + '){.' + videoType + '}\n';

			mde.codemirror.doc.replaceSelection(videoText);
			vueVideo.cancel();

		}
	}
});