It could be the encoding of the original video itself that may be causing the problem. By default, Mezzmo will re-mux compatible streams within the original video file to the transcoded video (the reason for re-muxing is for fast transcoding). But re-muxing may transfer the badly encoded or incompatible stream and stop playback as you are getting. As a test, right-click on the video and click 'Pre-transcode Files'. On the Pre-transcode Files dialog, select your TV and click 'Choose Files'. On the Transcoding Formats dialog, select the bolded format and select the 'Force full transcode of all channels' checkbox. Click OK to start transcoding. Wait until transcoding has completed and then try streaming the video now on your TV. Let us know if it plays OK.