Yep! I'm the creator of YouTubeDrive, and there's absolutely nothing in the code that depends on the symbolic manipulation capabilities of Wolfram Mathematica -- you could easily port it to Python, C++, whatever. However, there are two non-technical reasons YouTubeDrive is written in Mathematica:

(1) I was a freshman in college at the time, and Mathematica is one of the first languages I learned. (My physics classes allowed us to use Mathematica to spare us from doing integrals by hand.)

(2) I intentionally chose a language that's a bit obtuse to use. I was afraid that I might attract unwanted attention from Google if YouTubeDrive were too easy for anybody to download and run.