Dailymotion Downloads?

There is a half hour music performance I'd like to download from Dailymotion mainly to avoid those infernal adds that interrupt right in the middle of a song. There are several sites that do this for free, but want to install download management software on your computer which I am reluctant to do. (malware/spies) So my questions are:

Has anyone used any of these?
What's your favorite, pros & cons?
Is there a free site that doesn't install software like the youtube downloaders?