Do I need a LockPick?

I just bought an 07 Yukon XL today with Navigation but it does not have DVD. I'm installing my Vizualogic headrest screens next week.

The AV box for the headrests has the red, white and yellow outputs for audio and video (I believe those are AUX outputs). Is there a way to plug those in my Navigation screen or do I need some type of "input interface"?

In either case, will I need a LockPick or something to allow me to play it while in drive? If so, someone tell me EXACTLY what all I need to get and I'll get on with this.

Thanks!

I would say yes that you would need an external device (like the Lockpick) to allow an auxiliary a/v input to the head unit. Though you'll have to choose which DVD (driver or passenger side) you want the input to come from .