Have you checked to make sure all applicable drivers and extensions have been downloaded and installed from the Plugins menu? I have seen some media viewer plugins in there but have not tried them.
Never got quite that far, as it's just not super important to me ATM and there's already a big learning curve I've had to go through. I need to get all the satellite things locked down, IE figure out a fix for my Movies!/Start issue, and there's a few other things that are a bit off (channels renaming themselves, even in my user bouquets!, Webif timer plugin is a bit primitive, & the U.S. doesn't have good EPG for channels to use that for setting timers). Since I was running an RC version of NA SDGr, I was basically doing beta-tester duty for El Bandido anyway.
He's really amazing and knows his stuff, BUT, he needs to know there's "an issue" in the first place
and I have to be able to articulate it well enough that we can decide if it can be fixed, or "worked around". Not all of us use the receivers the same way, and he might not come across the same issues one of us might discover.
I brought this issue up to him several weeks ago (thread at LegitFTA), and I decided to give up on it after he had me change some things. I'll get back to it eventually. This receiver has basically only been in release for a tad more than 3 months, and it's already come a LONG way!
I still think it's the best one I've ever used.
p.s. There appears to be a bug in Firefox Quantum 65.0.2 (64-bit) with using the Webif screen that I only nailed down last night while working on the Movies!/Start channel issue. It doesn't always refresh properly, and causes odd little 'ghosts' of things that have been deleted or changed, but they don't refresh themselves without manually clearing the FF cache file on my pc. That said, the latest Google Chrome seems to be flawless on using the Webif stuff.