I had a VCR with something like this. It would scan the CCs for bad words and then mute the audio and filter the caption. You could even edit the lists. And it

I had a VCR with something like this. It would scan the CCs for bad words and then mute the audio and filter the caption. You could even edit the lists. And it was hilarious! Often the caption was slightly delayed relative to the audio so you would get a stream of swearing and then the rest of the dialog was removed :)