Best addon for downloading videos off youtube! Period. Rated 5 out of 5 stars

Great addon. Made my life so much easier.

There is one suggestion I wanted to make. I would like to have a configurable option to "not download videos if a file is found with the same name".

This is useful on social video sharing websites like http://www.reddit.com/r/videos/

In the morning, I can select the entire page and download all youtube videos. But since its a social website, it keep getting updated. I want to download all video again in the evening, but half of those videos are downloaded with almost the same name with appended "-1" in the end... or "-2" based on the number of copies of the same video.

I hope the developers get what I am trying to say and include this option of "not downloading duplicate files" in future versions.

This review is for a previous version of the add-on (4.8.2.1-signed). 

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Thanks for the review.
Please feel free to open a feature request at http://bugzilla.downloadhelper.net/ about your idea.