import re
description = "Tracks\n======\n0:00 Tonebox - Frozen Code\n6:00 SHIKIMO & DOOMROAR - Getaway\n9:30 d.notive - Streets of Passion\n14:55 Perturbator - Neo Tokyo"
print("This is the string:\n{}".format(description))
results = re.findall(r'(?<!\d:)(?<!\d)[0-5]?\d:[0-5]\d(?!:?\d)', description)
print("These are the results:\n{}".format(results))