I assume the Panasonic GT30 is your TV.
Can you play back a photo vs. movie or video (ie., does DLNA work for anything)?
From what you wrote, indicates your phone is seeing the TV on the network via DLNA (you got thru Step-4).
Perhaps it's hardware related issue of the TV.
Searched a couple minutes and found this comment related to Panasonic GT30 playback of movie files:
In order to playback over the DLNA protocol, UPnP, you need a proper DLNA certified/capable renderer to do so, like PS3, Boxee Box, VLC, etc. See
http://info.vortexbox.org/tiki-index...rdware_Players for some suggested hardware and software players that render content over UPnP.
*I do not know if this is directly related to your situation (was just one of the first search query hits returned to my that sounded feasible). If it applies, indicates to me that your TV is lacking hardware to support stand-alone playback that I believe you are attempting.
I know that on my Samsung LED flat screen I can play back photos, movies, etc. directly from external storage drives or from any place on my network without the need for additional hardware. Possibly the specs on the GT3 might indicate a need for a external rendering device for movie playback ...? Suggest that you look into the spec's/instructions on your TV to confirm built-in capabilities and support. I know direct play back from drives was a requirement of mine when I was shopping for last flat screen direct movie playback (via thumb drives, USB drives, NAS drives, drives on another network attached computers, etc.), in file types that I typically prefer (.mkv, .mp4, .H264, etc.) without conversion prior to playback. (Additional support both direct LAN cable and 802.11n wireless on the TV.) To accomplish this the TV must have some type of processor with graphics support and some amount of memory for buffering. I put this out there for you as illustrative example of considerations I had to make during recent TV upgrade I did at home, to be able to facilitate needs I had/wanted along with considerations I needed to understand.
If your TV does have this type of hardware (to support movie palyback), it could be possible that it just does not support the file type (.mkv vs. .avi vs. mp4, etc. - file compression technology) and/or the amount of data (standard definition, HD, 480p, 720p, 1080p). So maybe try a movie ina differenct file compression format.
I'm thinking that even though your TV may "support" DLNA, it may not have the built-in hardware to accomplish the task see you're looking to do without additional hardware support (xBox, PS3, etc. and/or VLC on an intergrated Media Computer). Of these examples, I have only had experience with VLC (was/is my go-to playback software for video).
Optional potential intern workarounds would include playback via direct HDMI cable connection, network connected media-computer (connected to TV - our last configuration before new Samsung), net-media device plugged into TV (our current configuration on secondary TV that is not net-capable).
Hopefully some help here or maybe some direction to find some solution and/or workaround for your problem.
Regards,