Retrieve video stream from mozilla/firefox cache

(Different trick) Open Broadcaster
see post "Enable mic at remote computer"
(Haven't try it)
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Ever wanted to save streamed videos when using adobe flashplayer?
(Haven't try it)
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Youtube (or another streaming video) can't be found on temp folder:

I've found there has always been some videos that download in sections but this has always been specific to those videos rather than a transient site bug.
I can usually tell which videos will end up complete and which split by the way the grey download bar moves from left to right ahead of the red playback bar.
If the grey bar moves left to right at a more or less steady speed the resulting file will be whole and playable offsite. If the grey bar moves in sections, pausing occasionally for a few seconds before continuing I know the resulting file will be split and unusable.
Maybe youtube want to stop downloading completely as watching offline/offsite means we don't view any site adverts
(source: Problems downloading videos from you tube, have they changed something)


Sites that provide downloadable video file/streaming:
http://laxx.dj/:
see temp dir and use hobocopy (pause video at last second to prevent it from replay and resetting temp file)

UPDATE Aug 11, 2011:
Look for file named fla*.tmp at your temp folder
You might need tool described here if the file cant'be copied:
How To Use HoboCopy To Copy Locked File In Windows 7?
usage: hobocopy source_path dest_path file_name
caution: path must NOT closed with backslash and should NOT be root folder

If the copied file seems can't be played, it's probably just a matter of finding an appropriate player software (examine file header if necessary)
FLV can be played with WMP

Older trick:
Let the video finished playing.

Type 'about:cache?device=disk' in your mozilla.

Locate the entry for the video in question:
Use Last-modified date, website address and size (video file usually has a big size) to find it.

Click the link on 'key' line.

'File on disk' will show the real file location.

Copy it to another location (Don't forget to add proper file extension).

Once you know where the cache folder is, it's much faster to directly open the folder anytime you need to find latest cached video file (as long as your OS isn't reinstalled)

If the intended video cannot be found in the cache folder, it's probably because the cache is full; try to empty it or set it to larger size ( Tools \ Options \ Advanced \ Network \ Cache )