I would rather watch the Holiday Special than any of the prequels. In fact I have thrown out my DVDs of the movies they’re so bad. I tried watching them again about a year ago thinking “they can’t be THAT bad”, but oh yes. They just get worse on every viewing. And that’s usually not a good quality in a movie. The DVDs went into the trash the next day.
The way I see it, there are now 5 Star Wars movies. Rogue One is the prequel, then you have Star Wars through The Force Awakens.