If you run 'while read aurl ; do youtube-dl --extract-audio "${aurl}"; done < path_to_batch_file' (batch_file contains one url per line) each call to youtube-dl consumed some characters and 'read' would assing to 'aurl' a non valid url, something like 'tube.com/watch?v=<id>'.
Do not throw errors if view count or upload date extraction fails.
Dispose of re.MULTILINE, which had absolutely no effect without any ^ or $ in sight.
Follow PEP8 naming conventions.
* E402: we exectute code between imports, like modifying 'sys.path' in the tests
* E731: we assign to lambdas in a lot of places, we may want to consider defining functions in a single line instead (what pep8 recommends)