YouTube poster image RegEx. The following code strips the YouTube video ID from the url which is then used as a parameter to retrieve the video poster image. There are different sizes available e.g: http://img.youtube.com/vi/<insert-youtube-video-id-here>/0.jpg http://img.youtube.com/vi/<insert-youtube-video-id-here>/1.jpg http://img.youtube.com…

youTubePosterImage.cshtml

@using System.Text.RegularExpressions;
@{
  string image = String.Empty;
  string youtubeid = string.Empty;

  // Strip youtube id from the url so we can use it as a poster image
  Regex regex = new Regex(@"^(?:https?\:\/\/)?(?:www\.)?(?:youtu\.be\/|youtube\.com\/(?:embed\/|v\/|watch\?v\=))([\w-]{10,12})(?:$|\&|\?\#).*");
  Match youtubeMatch = regex.Match("youtubeurl");

  if (youtubeMatch.Success) {
      youtubeid = youtubeMatch.Groups[1].Value;
      image = "http://img.youtube.com/vi/" + youtubeid + "/0.jpg";
  }
    
  <img src="@image" alt="YouTube Poster Image" />
}