public static TrainingRouteVideo TrainingRouteVideoById(string videoId)
{
return(TrainingRouteVideos.Single(x => x.VideoID == videoId));
}
public static IEnumerable <TrainingRouteVideo> TrainingRouteVideosByRouteId(string routeId)
{
return(TrainingRouteVideos.Where(x => x.Route == routeId));
}