When products are designed, they go through a meticulous process in the very early stages of development called; requirements & functional analysis. The result of this process ensures that your RX100 records videos optimised for playback and editing quality using well suited low compression codecs. In the same way your XD93 is optimised to render the best image out of a variety of different input signals using the most advanced image processing and rendering techniques. This means that you as the end-user, are provided with the best tools to design your own solutions. This is the reason why there is not and there will never be a TV or Camera that will do it all for you, while individually they are the best in what they are designed to do.
Therefore, my suggestion for you would be to install plex on your Windows Server 2012 and let software do the delivery work to your TV. In this way you directly have access over all your footage on your NAS through the TV PLEX app and it automatically squeezes the best quality out of your files without unnecessarily exceeding your maximum network bandwidth.
Depending on other requirements you might have, you can also think of dedicating a Windows based platform (think of 8th generation Intel NUCs with support for HDR and HDCP 2.2 on HDMI 2.0 jacks) which opens doors for even off-loading more processing power from your TV (read: less AndroidTV apps resulting in faster TV) and potentially unlocking more capabilities of your TV (e.g. audio and video decoding formats, network authentication, WLAN/LAN bandwidth). A good example of unlocking capabilities is the scenario to have Netflix output Dolby Atmos sound (NUC->AVR) coupled with Dolby Vision picture (AVR->TV).
