How to find video in Firefox cache?

I'm trying to find youtube video (just watched) in Firefox cache folder, but I cant find the folder.
win xp sp3
Firefox 16.1
I tried

C:\Documents and Settings\eDIN\Local Settings\Application Data\Mozilla\Firefox\Profiles\xp44aixq.default\Cache

Also

C:\Documents and Settings\eDIN\Local Settings\Application Data\Mozilla\Firefox\Profiles\49mvq84u.default\Cache

In this folder I found the png thumbnail of visited youtube page

C:\Documents and Settings\eDIN\Local Settings\Application Data\Mozilla\Firefox\Profiles\49mvq84u.default\thumbnails

But, there is no video file.
I also searched all files and folders arround (Default user, All users...etc).
There is only one win user.

Solution 1:

The video will be there in the cache only as long as you are seeing it in the browser, after which it is deleted automatically. I would recommend using plugins provided by modern browsers if you want to download the video.

Solution 2:

You can check the cache file easily by going to the following:

about:cache

Enter the above into your URL or location bar.

Solution 3:

THIS ANSWER IS ONLY FOR FINDING FLASH VIDEOS.

Tested version

Firefox 38.0.5

Shockwave Flash 17.0 r0

Latest Firefox with latest Flash player on Windows will save the Flash videos in

C:\Users\<your user account>\AppData\Local\Temp\acro_rd_dir\

The file will be something like fla****.tmp. You have to change the .tmp extension to .flv extension to make it playable (Most modern players will accept a drag and drop of the file even without changing its extension).

**** If you have trouble in finding the folder Hit Windows+R and in the popup Run Dialog copy and paste this

%appdata%\..\Local\Temp\acro_rd_dir\

and hit Enter.

Solution 4:

Regarding viewing the cache contents, there's a nice Firefox extension named CacheViewer Continued - like the name suggests, it's a fork of the CacheViewer.

Regarding the question about YouTube video being in cache, I've answered a related question yesterday. Basically, most of the videos you watch on YouTube won't be cached -- if they exceed certain size (you don't want to purge your whole cache after watching several videos).

If you want to download videos, you can use one of the addons from addons.mozilla.org or userscripts. By the way, you can also view URLs of all the resources loaded on the page (including audio and video files) by opening AdBlock Plus' "Open blockable items" menu.