Flash For Mac Safari
It seems sites like Youtube don't create playable flv files any more. In 10.7.5 I see that it creates files in a dedicated 'MediaCache' folder, and those files don't play in VLC. With a few othes sites that I occasionally visit, I still see files created in the temp folder that I can play with VLC, though, even in OS X 10.8.2.
So, while 10.8.2 may place some files in a different folder now, they're as useless as the ones it previously placed inside the temp folder's MediaCache folder.
The only ones I found to be playable as those whose names start with 'FlashTmp'.
I don't believe this has anything to do with Apple or OS X. It's a choice of the Flash Player and/or the website, trying to prevent us from keeping copies of the movies, plain and simple.
And on using the 'ln' command:
To preserve and play these FlashTmp file, you'd either, once they're fully loaded in the browser, copy (duplicate) them, and adding a '.flv' extension to them, or - while they still load - use the 'ln' command in Terminal as follows:
ln FlashTmp.xyz Movie.flv
You will first have to 'cd' into the directory where the flash file is, though. Ask google if you don't know how to do that.
Save Flash For Mac Windows 10
Save Flash On Mac
Make sure your Mac is connected to the external storage device (for example, using a USB cable or over a network). Click the Finder icon in the Dock to open a Finder window, then do one of the following to move your files. Move files to the storage device: Select one or more files on the desktop or in a folder, then drag them to the storage device, listed below Locations in the Finder sidebar. Many of the most prevalent Mac malware right now arrive on your Mac via a fake Flash Player download. Read more about the threat of viruses and malware on the Mac and how to protect yourself here.