Sorry... I didn't mean to imply that the TV data goes over the RJ45 on the ONT - I started out with one thought, then changed to another midstream.
What I meant by "On-Screen Program Guide, VoD, and MediaShare DVR functions may be impacted", is that these services may be affcted depending on how the multiple routers are connected if you start changing the upstream-side connectivity of the FIOS router.