Answer: Try opening it with another app on the TV, but if that does not work try connecting a USB flash drive to the USB connector that is built into Smart TV. It can be located on the back, side, or front panel. Find a suitable connector on your TV, install the USB stick into the connector, take the TV remote control, and select the desired folder in the file system.
Try using a different USB drive, format the current Flash drive with the right format (such as FAT32) then paste, or save the supported file again. If other files do not play, perform a reset.
Make sure that the USB drive is fully inserted into the USB input of the player.
Make sure that the file being used is one of the supported file types. A list of the supported file types is available in the operations guide.
Attempt to play a different file.
If other files play, there may be an issue with the file itself. Try removing the file from the USB drive and saving a new copy.
IMPORTANT: If the file being used is corrupted or was recorded using an unsupported codec, the player will not be able to play the file.
Try using a different USB drive, format the current Flash drive with the right format (such as FAT32) then paste, or save the supported file again.
If other files do not play, perform a reset.
Using the supplied remote control, press the Home or Menu button.
Select Resetting.
Select OK to reset the player back to factory settings.
Hope it helps! Type me feedback in the comments, so I know if it is not correct.