This is an excellent app. The downloads are easy to use. The extra money for HD is well worth the investment. I've used the app for a long time to download videos to show to my classes in secondary school. Take time to support the app if you enjoy downloading videos for educational use. For those complaining about wanting a free app, you can pay a small fee. I just put down $15 since I find the app well worth the effort of development and maintenance. If you have problems, check your service and make sure your computer does not have lots of programs running that may cause play problems. The two HD videos I downloaded are excellent in quality and playback.