LG G3 Device identifier:LG-D855, LG-D851, LG-D850, VS985 4G, LGLS990, LGUS990, LG-D852

any format, check domain to make sure it's a youtube url

Simple file names. Special chars allowed (-_.) {3, 40}

Second line of the machine readable passport, based on the excellent article here - http://www.highprogrammer.com/alan/numbers/mrp.html

checklists item

Get directive names from javascript code

get the file extension of a given filename

The file name validation algorithm from MS KB905231, I assumed the prohibited suffixes included the file extension. I.e. 'foo.doc.files' would not match but 'foo.files.doc' would.

date should be in format YYYYMMDDHHMMSS