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IDM can "grab videos" a "Download This Video" button pops up whenever you are watching a video anywhere in the Internet, and its shows the video size, and when clicked, allows you to download it.

Is there any other software that can do this ?

I want to know the size of videos before I watch them (so I know their approx quality).

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up vote 1 down vote accepted

There are a number of firefox addons that do that including:

As always, beware relevant copyright issues.

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+1 good answer. As always. – wizlog Oct 2 '11 at 18:48
Thanks. If it works, please accept it. – Yitzchak Oct 3 '11 at 2:03

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