Step 1. Locate your Firefox browser cache URL.
Type in about:cache in your address bar and press enter.
Three listings will be displayed, that being Memory cache device, Disk cache device and Offline cache device.
You want to pay attention to Disk cache device. The cache directory will be listed there. It will be something like this and be very long:
C:\Documents and Settings\[your windows account]\Local Settings\Application Data\Mozilla\Firefox\Profiles\[your firefox profile].default\Cache
Step 2. Open up a Windows Explorer and load the cache directory
Note: Windows Explorer is not the same as Internet Explorer.
While still in Firefox, highlight the entire cache directory and copy.
Click Start then Run, type explorer and click OK.
A Windows Explorer appears, usually landing in My Documents first.
In the Explorer address bar, paste in the cache directory.
When loaded it will look similar to this:
When you see this, click View then Details.
Then click View, then Arrange Icons By, then Modified so the most recent file is listed at the bottom of the file list first. (If you want it listed at the top, just click View/Arrange Icons By/Modified again.)
Looks like this:
Before continuing, if you’re asking, “Why not just click List Cache Entries from about:cache?”, the reason is because there’s no way to sort cache files in Firefox, but with Explorer you can.
Leave this Explorer window open as-is and go back to Firefox.
Step 3. Go to YouTube and load up a video.
I will use this video as an example.
When you load the video there is a red bar at the bottom of the YouTube player as seen above. Wait until this bar is completely filled from left to right. When it is, this indicates the video is completely downloaded locally.
Step 4. Get the FLV and store it wherever you want.
Go back to your Windows Explorer and press F5 to refresh.
Assuming your file list has newest files listed at the bottom first, the newest file there will in fact be the video. It will be a somewhat large file compared to other cache entries. The video linked above should have a size of 4,606 KB and look similar to this:
Important note: The name of your file will most likely be different from what’s shown here.
Right-click the file and select Rename. Rename the file whatever you want and add the extension .FLV at the end. (If this does not work, click Tools then Folder Options, click the View tab and uncheck “Hide extensions for known file types”.)
Right-click the file again after renaming, Cut, minimize everything until you see your desktop, then paste the file direct on the desktop.
If all goes well, you’ve got your FLV downloaded locally to the Desktop.
For any other YouTube video you load in your browser, follow suit. Load the video, go to the cache directory in Explorer, F5 to refresh, look for the newest larger file, rename, cut and paste on the Desktop or anywhere else you want the file to go.
Does this work for other video sites as well?
Yes. Any site that uses the FLV format (which the vast majority of them do) will have the video file itself downloaded locally to your cache to view it in your browser. When that happens you just go to the directory as outlined above and grab your FLV there.
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