Greenbean66,
If you are using the yellow RCA video cable, then your BR player is defaulting to output a 4:3 signal, not 16:9. Since you are watching SD DVDs, you would not see true HD, but if you had a proper TV, the BR player would upscale your DVD picture to whatever the maximum resolution a new HD TV could handle. Since your TV does not have Component connectors (Component connection uses 3 RCA-type cables for video, which are Red, Green and Blue and audio is by separate cables.), you are only seeing the resolution of your TV, which may only be 480 lines of resolution. On your BR player you have Picture Format choices, one of which is 4:3 Normal. When using this and while trying to watch a Widescreen 16:9 DVD, you will get an image that has large black bars on the top and bottom with an image across the middle of the screen like a band aid. If your BR setting is to default 16:9, then the image you get on your 4:3 will be squished vertically (people will look tall), but you won't have black bars. Unfortunately, your BR player is technologically way more advanced than your TV, so to really see Widescreen DVDs in their full glory, you will need to buy an HDTV which will have a 16:9 screen, which is what the other poster suggested.