Why is my Smart TV not playing videos from my USB?

Check if the file is supported by your Smart TV
Your Smart TV may not be able to play all the video files that you have saved to your USB drive. To check which files types your Smart TV supports, browse the manual of your Smart TV or consult the website of the manufacturer.

Try Faster USB connection
Sometimes the connection between the USB and your Smart TV can be too slow to handle some media files. Try using a faster USB connection such as USB 3.0 if available.

Test with Different USB Drives
Not all USB drives are created equal. USB drives with larger capacities and different speeds can offer different performances. Try using different types and brands of USB drive.

Format Your USB Drive
Try formatting the USB drive to fix any potential issues. Make sure you backup its contents beforehand. Different video playbacks can require different formats such as FAT32 or exFAT.