[YouTube] Allow supplying extra parameters to the YouTube element

[rbozan]

media-elements/packages/youtube-video-element/youtube-video-element.js

Lines 44 to 58 in dada41b

	const params = {
	// ?controls=true is enabled by default in the iframe
	controls: attrs.controls === '' ? null : 0,
	autoplay: attrs.autoplay,
	loop: attrs.loop,
	mute: attrs.muted,
	playsinline: attrs.playsinline,
	preload: attrs.preload ?? 'metadata',
	// origin: globalThis.location?.origin,
	enablejsapi: 1,
	showinfo: 0,
	rel: 0,
	iv_load_policy: 3,
	modestbranding: 1,
	};

According to this page:
https://developers.google.com/youtube/player_parameters

The YouTube embed supports multiple parameters but they can not be passed using this package.

Personally I am missing start, end and cc_load_policy

Old issue

muxinc/youtube-video-element#26