[wombat]

Kód:

for quality in sorted(url[u'data'][u"mp4"], key=lambda kv: kv[1], reverse=True):
        stream_quality=quality
        video_url = url[u'data'][u"mp4"][stream_quality][u"url"][3:]

nahradit:

Kód:

video_url = url[u'data'][u"mp4"]["720p"][u"url"][3:]