Userscripts.org

On video titles with characters that can not be used in a filename the video filename gets cut off like the one below, from what I can tell at the last "illegal" character.
http://www.youtube.com/watch?v=xYicsG5k1eo.
Can this be fixed? maybe by replacing the illegal character with a similar legal one (: to =) or if that is too difficult replace all with a common character for filenames like an underscore.
And could you please add the vertical resolution (480p, 720p, 1080p etc) and the codecs used (H264_AAC, VP8_Vorbis etc) as options for the video filename?

Thanks for a great script by the way :)