In case there's any doubt, yes - it works just fine over a bridged VPN. And if both sides are FIOS, it does HD MRS just fine over a bridged VPN - almost indistinguishable from local.
(We put a lot of work into trying to make it work over a routed vpn. Helper forwarders, a little tivo protocol aware repeater on each router, and got it kinda working, but it was never reliable. So we went with a fully bridged tagged vlan, and it's been rock solid...)
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