I see so many variations of this circuit, but all have the resistor before the jack, not after the return signal like mine..
This one looks like it'd make one side of the headphones not as loud as the other.. :/
and then this one:
Looks like it could work, and takes into account for them usually being stereo headphone jacks..
As for the 1/8th jacks not being long enough, i was going to dremel out an exact hole side into the side of the TV's cabinet, then use a slightly larger drill bit to "sink" it into the case a little.