Youtube Blocks its videos from C# apps
C#'s webbrowser control is an old version of Internet Explorer that you can drop into your app. You use it to put a webrowser in your C# app. Youtube had posted messages that it will no longer support older browsers so finally they cut support. So a lot of my C# apps could no longer play Youtube videos there is only a black or white screen showing. I updated the Prince Fan 2 app and the Rhett Akins Fan 2 app.
This has taught me an important lesson that you can't use other company's technology or depend on it because one day they may cut support. I had done a Prince Fan app and it was really cool to see Prince's videos play in my app. It wasn't my technology and I should not have depended on it to attract users to my app.