Exactly why I was trying to say that it isn't that big a deal.
You can play with the settings and try and keep it crystal if you're concerned with the quality, but simply hooking up the wires will more than likely provide a more than acceptable (if not good or great) picture.
(if your realplayer clip is already at low quality, hooking it through the tv will not improve this. The transfer to the tv just won't ruin an existing high quality clip)
The positives of watching a DVD/Clip on a tv compared to a laptop far outweigh any negatives/loss in quality.
As an aside...
Just a couple of weeks ago happened to have my laptop bag in the car. Grabbed the connection in question, grabbed my uncles laptop and using his (old) CRT TV he had never connected too before, had my little cousins watching a couple of DVDs within 5 minutes.
(To be fair, what one person feels is a good tranfer another may feel is poor. Similiar to the MP3 vs. CD debate. To my ears, little to no loss on an mp3, to others, it's a terrible loss. That debate will never be answered, this one would be in a similiar vein.
All of Polo9n's points are true, but only if your really concerned about good quality. For normal use I personally feel the quality is more than good enough)