Playing DigitalTheatre mp4s to Viera Smart TV

I subscribe to a paid-for service called Digital Theatre which lets me 'rent' (and view streamed) or purchase and download filmed performances of live theatre.
I can watch these on my Windows 7 computer. However, the downloaded MP4 files will play only (presumably because of copy protection) with Digital Theatre's dedicated (Adobe-Air-based) player, and require you to be on-line (presumably so it can check your account credentials). The files will not play in Windows Media Player.
I want to watch these videos on my Panasonic Viera Smart TV. Digital Theatre have an 'app' to do this, but it is only available for Samsung, not for Panasonic TVs. I can play ordinary videos in WMP and tell it to 'Play To' my TV. I can watch TV on my computer. I have installed Serviio and the TV sees the Servio server and can connect to it.
Is it possible to watch the Digital Theatre files on the TV and, if so, what do I need to to to enable that?

Any help would be greatly appreciated.

Making a lot of assumptions around gear and expertise here, but the easiest way to do this might just be to run HDMI from your laptop to your TV. Not the most aesthetic, but certainly workable.

Thanks for the suggestion. Unfortunately distance makes it impractical to link via HDMI. PC & Router are at least 20 metres away from TV.