Fast way to download a video from an URL

Is there an easy way to download a video from an URL to the device or to your Dropbox?

The only way I have managed to do that is using Mercury: manually copying the URL, going to the download manager and then pasting the URL there. Then, from Mercury I can save it to my camera roll or upload it to Dropbox.

Is there an easier way of doing this? Any way that doesn't involve copy/paste, either using Mercury or any other browse?