Jake, when you write that
Patented video codecs are a big part of the problem, though there are
free alternatives (Theora and Dirac for example), they are not widely
used.
then you are clearly implying that the alternatives (i.e. Theora and Dirac) are not covered by
patents. I really do not think I am reading things into your article that are not present in
it.
You could avoid this by either replacing "patented video codecs" by something along the lines
of "video codecs with known patent pools" or simply avoid making a statement about the patent
situation at all or by speaking about the licensing fees (protection money rather) that some
entities collect for its use.
As an alternative you could rephrase the above paragraph like this:
Video codecs requiring licensing fees for certain uses in certain parts
of the world are a big part of the problem, though there are alternatives
that do not require licensing fees (Theora and Dirac for example), they
are not widely used.
This would certainly be a tad more cumbersome, but you would not make statements which are
misleading and for which you have no proof. You get my drift.