Aren't they in wow folders?
I know they're somewhere in the WoW folders, but I'm not sure what format they're in and I can't look for them on the computer I'm using.
Buuut... you could acquire an addon to download youtube videos and thus go and download them off youtube. Or you could ask someone else to acquire them for you, stick them in a .rar file or something, and upload that file somewhere for you to download.
Do you want them to make gifs of or movie edits or something?
The old cinematics should be fine, but newer ones have been modified specifically to prevent viewing them externally.
The file has been broken intentionally with that missing part being inserted on-demand into memory to allow proper playback.
That is why we didn't get spoilers of the garrosh ending.
They're in your WoW folder.
I had access to the videos but they don't have any sound. Why is that?
Well there's tons of youtube downloaders, so if you want to rip a nice 1080p or whatever video off youtube you're more than capable of doing so without downloading any programs or clients. If you want to rip it straight from the WoW folder, there's plenty of clients and addons for such a thing. All it takes is a 5 second google search.
"If I didn't have bad luck I'd have no luck at all."