Can you download this for Android?
No, the application is not available for downloading on Android because it wasn't developed to run on mobile devices, however, there are plenty alternatives available. You can browse all of them using the link below or simply type youtube downloader in the Play Store application. I recommend the Play Store way because the Search filters will display only the compatible applications.
Play Store alternatives: https://play.google.com/store/search?q=youtube+downloader&c=apps&docType=1&sp=CAFiFAoSeW91dHViZSBkb3dubG9hZGVyegIYAIoBAggB:S:ANO1ljIA-ic