Do the sddefault->hqdefault fallback

When doing this, apply referrerpolicy (ampproject/amphtml#3940)

Line: 26

platform-documentation//src/assets/javascripts/lite-yt-embed.js

Lines 23 to 33 in d71564d

    
                    * 
        
                    * See https://github.com/paulirish/lite-youtube-embed/blob/master/youtube-thumbnail-urls.md 
        
                    * 
        
                    * TODO: Do the sddefault->hqdefault fallback 
        
                    *       - When doing this, apply referrerpolicy (https://github.com/ampproject/amphtml/pull/3940) 
        
                    * TODO: Consider using webp if supported, falling back to jpg 
        
                    */ 
        
                   this.posterUrl = `https://i.ytimg.com/vi/${this.videoId}/maxresdefault.jpg`; 
        
                   // Warm the connection for the poster image 
        
                   LiteYTEmbed.addPrefetch('preload', this.posterUrl, 'image');

	*
	* See https://github.com/paulirish/lite-youtube-embed/blob/master/youtube-thumbnail-urls.md
	*
	* TODO: Do the sddefault->hqdefault fallback
	* - When doing this, apply referrerpolicy (https://github.com/ampproject/amphtml/pull/3940)
	* TODO: Consider using webp if supported, falling back to jpg
	*/
	this.posterUrl = `https://i.ytimg.com/vi/${this.videoId}/maxresdefault.jpg`;
	// Warm the connection for the poster image
	LiteYTEmbed.addPrefetch('preload', this.posterUrl, 'image');