pip3 install youtube-dl

worked for me, It's somewhere in python land.

one of the reasons i switched back to redhat was that packages moved very slowly through the debian system. i just check on gnucash at debian.org and for the stable and testing it lists 1.3.4 as the version available with testing at 1.6.4 and when i check at gnucash.org i see that 1.6.0 was released 10-6-01 over 4 months ago and yet a serch of packages at debian.org does not even show 1.4 for the stable release. is it stable or stagnent??