sorry PsyTrance , i can't help with that one , i tried , but seems the duration of the video is not in the html source code ( from where the script reads to search everything , go to any video and in your browser check the source code , search the time and you will see is not there ; all the durations i can see are from the related videos but no the playing one :( ) , i tried with several videos , seems like the duration is embedded in some way in the flash player and not in the html itself , maybe someone else with more experience in scripting can help us with that :)

PS : i add something i found :) i replaced
title="(.+)"> )) set %youtuberating $regml(1)

with
title="(.+)">)) set %youtuberating $regml(1)

only deleted the space after title="(.+)"> , in some videos was not working right