Some of the codecs distributed with VLC are patented and require you to pay royalties to their licensors. These are mostly the MPEG style codecs.
With many products the producer pays the license body (in this case MPEG LA) so the user (commercial or personal) does not have to take care of this. VLC (and ffmpeg and libmpeg2 which it uses in most of these cases) cannot do this because they are Free and Open Source implementations of these codecs. The software is not sold and therefore the end-user becomes responsible for complying to the licensing and royalty requirements. You will need to contact the licensor on how to comply to these licenses.
This goes for playing a DVD with VLC for your personal joy ($2.50 one time payment to MPEG LA) as well as for using VLC for streaming a live event in MPEG-4 over the Internet
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