Add an IE to support bigflix.com. It uses some sort of silverlight
plugin whose video url is being populated using base64 encoded
flashvars. So it is quite straightforward to extract.
"This check should take place earlier and should be more general if not video_url:. Same should be done for video_play_path. Also these fields better extracted with xpath_text."
Suggestions by @dstftw
If you run 'while read aurl ; do youtube-dl "${aurl}"; done < path_to_batch_file' (batch_file contains one url per line that uses the hls downloader) each call to youtube-dl consumed some characters and 'read' would assing to 'aurl' a non valid url
(This is the same problem that was fixed for the ffmpeg postprocessors in cffcbc02de)