This is a great add-on. I have used it for years to extract videos for my prison ministry. However, like Devilshaker, it has stopped working for me. I also uninstalled and then reinstalled the add-on. This worked that last time I encountered the cannot detect url_encoded_fmt_stream_map... but not this time. Perhaps the developer has not yet fixed the current version for this occurance of the problem. I hope it gets fixed soon.