Keep 'Your Music' playing after solving captcha

Hi!

I have Sony ZX1 Compact and Spotify doesn’t work (even if I disabled all stuff that may disturb the process in the background), so I decided to stick to music I have on my phone directly.

Would it be possible to make Sleep keep playing a selected ringtone/playlist in ‘Your Music’ (or even Spotify and others) until it finishes or is disabled by a user? I rather hate cutting a song short :confused:

Thanks!