The common way is to first get it working with a normal headphone via the headphone jack, than switch to a bluetooth headphone.

Caveats with a TV are:
- some TV's don't have a headphone jack
- the internal speakers may stay on or may be switched off when connecting a headphone
- volume control via the remote might work or it might not work
That's why you should first see to get it working with the normal wired headphone.