YouTube-DL-PyTK (formerly known as YouTube-DL-GTK) is just a graphical launcher for the popular youtube downloader youtube-dl . Its purpose is simple; to facilitate the downloading of non-copyright-protected videos from certain internet websites including YouTube.
It is written in Python, so it should run on Windows and Linux systems alike. I don't have access to an Apple computer to test it on Mac OS, but it might also work on that platform. Source code is included.
I digitally sign some files in my releases. If you'd like to verify those signatures, you can find my PGP/GPG keys at:
https://marcusadams.me/gpg.html
If you'd like to donate there's several ways to do so:
PayPal: https://paypal.me/gerowen
Bitcoin (BTC): bc1q86c5j7wvf6cw78tf8x3szxy5gnxg4gj8mw4sy2
Monero (XMR): 42ho3m9tJsobZwQDsFTk92ENdWAYk2zL8Qp42m7pKmfWE7jzei7