As far as we know, codec support is likely to be limited to whatever Panasonic decided to support in their TV. Unfortunately the video's you play on the TV will need to be formatted in such a way that they are encoded using codecs supported by the TV. Panasonic may have the list of supported codecs in the manual of the TV hopefully otherwise you would need to ask them or play the game of encode and test until you find something that works.
If your Panasonic TV can't either read some video file like MP4, MKV, MOV etc or when it does the images are kind of distorted with poor audio, you may get some videos encoded beyond Panasonic TV's support. Something even worse, you will not be able to install codecs onto a TV like you would a PC unfortunately. An ultimate solution to get unsupported format detected by your Panasonic TV is to convert unsupported videos to a Panasonic TV more friendly format with Pavtube Video Converter
Best Way to Play unsupported videos on Panasonic TV from USB