Most TVs have a USB input (unless really old) and you can play films off a USB stick.
Even my 85 year old Mum did it this way.
Get them on a tablet and cast to the tv using a Chromecast or such. Or you could buy a cheap DVD/bluray with a USB port. But you might have compatibility issues. Hence a tablet is better. Or just a smart phone.
Some older TVs won't play movies from the USB.or even easier the USB slot in the TV
Some older TVs won't play movies from the USB.
If it's a recent TV probably will though.