TV + Arduino

So is this a way of saying that If I follow the earlier schematic that I've uploaded & put the RCA cable at it's jack at my TV's back & then sent the TV to feed from the composit (Which is a way of setting when we plug in DVD players with TV), It won't work?.

I'd really admire this if you just step wise tell me what to follow.

Also I found some PIN change setting over another picture I got over google.

Confused which one to follow. :~