Advice please: Our client's youtube embed have stopped working after years of stability.

Looks like our code was never using it's own api key: Something must have changed on google's end or umbraco's end.

1. Did the app hardcoded in the code "YouTubeHelper.cs" possibly get disabled or hit a quota limit? https://console.developers.google.com/apis/api/youtube.googleapis.com/overview?project=103677695896

Error in our log files indicated "YouTube Data API v3" may need to be enabled or quota limit increased?

" Google.Apis.Requests.RequestError Access Not Configured. YouTube Data API has not been used in project 103677695896 before or it is disabled. Enable it by visiting https://console.developers.google.com/apis/api/youtube.googleapis.com/overview?project=103677695896 then retry. If you enabled this API recently, wait a few minutes for the action to propagate to our systems and retry. [403] "

1. Trying to get this 2014 package to run under our client's own app key still fails:

   2.1. Is it possible that I need to update & rebuild the source code as YouTubeHelper.cs is hardcoding the app name (_ApplicationName) meaning GetYouTubeService() may be failing authentication? Line 14:

   private const string _ApiKey            = "";
   private const string _ApplicationName   = "YouTube for Umbraco";
   
   
   /// <summary>
   /// Gets the YouTube Service that we use for all requests
   /// </summary>
   /// <returns></returns>
   public static YouTubeService GetYouTubeService()
   {
       var youTubeService = new YouTubeService(new BaseClientService.Initializer()
       { 
           ApiKey          = WebConfigurationManager.AppSettings["YouTube-Umbraco:ApiKey"] ?? _ApiKey,
           ApplicationName = _ApplicationName
       });
   
   
   return youTubeService;
   
   
   }
   

2.2 Things I've tried: a. Configuring an app for our client:

Enabled the "youtube api v3 api" & generated an app key for it which I've put into Staging. https://console.developers.google.com/apis/credentials?project=my-project-12345678your-own-id-here

b. Enabling domains for our live and staging sites: https://console.developers.google.com/apis/credentials/domainverification?project=my-project-12345678your-own-id-here

b. Adding two keys into our web.config file:

Ta, Nix