need some help

Solution
Depends on the TV model and what it's USB port is designed for.

On my TV, the USB port is only for viewing JPEG pictures on a pen drive or external hard drive, it doesn't support showing media direct from a phone.

Read the TV instructions or just try it.
It depends on where the videos are stored. If you download them to the phone (they take up a lot of storage space) you could use a microUSB to HDMI cable to watch them on a television set.

If they're stored elsewhere the biggest problem would be that you'd see very little before the battery ran out and you have only one connection.