- Check your Smart TV’s documentation to determine what type of video formats it can play back. 
 - Verify that the video file you are attempting to play is in a supported file type. If not, use a video conversion tool to change it to a compatible format. 
 - Check the video file’s size limit. Some Smart TVs have built-in limits on the maximum size of video files they can playback. 
 - Check the connection between your Smart TV and the streaming device. If using an external streaming device, make sure the connection is secure. 
 - Confirm that your TV’s firmware is up-to-date. Older versions of firmware may not be compatible with certain video formats, so updating your firmware might help. 
 
