can the Apple USB SuperDrive be used with a TV?

The Apple superdrive is a product with strong compromises. It draws about 900 milliamps when most USB ports are limited to 500 milliamps. It requires some obscure patches to work at all on a Mac that shipped with a DVD reader. It is a notebook-type drive inside, and is not especially rugged.

If you do not already own this unit, I find it difficult to recommend it.

a desktop-type drive (with a tray) in an external enclosure is a much better choice.

Did you know you can already share the drive on almost any Mac or PC on your Home network?

Use the CD or DVD drive from another computer with your Mac - Apple Support

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The travel trailer has a USB connection that can be used, but I'm wondering if you can use it as a DVD player and if you can eject without the computer.

No.

connect the Apple USB SuperDrive to the computer, and connect the computer to your TV.

Use multiple displays with your Mac - Apple Support

I do need to play CDs and DVDs

Then get yourself a multi-media CD/DVD player (like a tape player), with audio and Video outputs.

That Apple USB superdrive is for installing digital software on a Mac..

NO