Try other encodings. Also, try USB if this supports it so you can try other encodings. I like Handbrake since usually one of the stock profiles works.
Remember this is an ongoing complaint about Smart TVs and players. While makers may document encoding support they stop short of supplying an encoding software or telling us how to encode.
When playing 1080p MP4 video recorded on a Verbatim DVD+R disk, playback halts after about 7 minutes, starts then stops after a minute or less showing "reloading". Disk recorded on iMac OS X system.