hello there,
First introduce myself am experienced android developer and done many application, i saw your requirement am glad to work on this project, because i am ready done this type of application.
Am well familiar on youtube downloader api and also create application Why i told these means am already done this project and also develop this app with your expectation and also with your budget, please contact me if you have any queries am eagerly to do this project
thanks,
Vignesh