Use the USB port on the TV. If there is no USB port, you can use an adapter to connect the pendrive to the TV's HDMI port.
Turn on the TV and select the input.
Use the remote control to turn on the TV and select the input that the pendrive is connected to.
Open the media player app.
On your TV's remote control, press the menu button. Select photos, videos, and music files, then select videos.
Select the video you want to watch.
Use the arrow buttons on the remote control to navigate through the list of videos and select the one you want to watch.
Press the play button.
Press the play button on the remote control to start watching the video.