Like someone else said... "piracy" is a bad term, and the way it's used, it creates an automatic involuntary negative attitude towards those who practice this. I don't believe that using my father's Nortun Utilities disk makes me a pirate, even if I didn't buy the software. There's no difference between him using the program on his two home PCs in the same house, or having it installed on his main computer and giving a copy for my own main machine, at another address. Nobody would call you a pirate for borrowing books, or a hammer.
And here's a funny story - I just bought a Canon camera which also takes video clips in MJPEG format. I discovered pretty quick that all my videos have a "PICVIDEO; www.jpg.com" watermark on them... Now, Pegasus, the firm that makes the Motion JPEG decoder, wants money for the decoder (current version 3), although version 2 used to be free (and it can no longer be found on their website.) I got the MJPEG codec in a larger codec pack (Tsunami), so it didn't have a registration code (which, again, USED to be free, once you e-mailed Pegasus)... so I had to look for a code on the 'Net for my software, in order to prevent my video files from being botched. A perfect example of stupid corporate policy, leading to consumers unwittingly becoming "pirates", to use your terminology...