Video DACs ADV7123-EP and ADV7393 output opamp driver circuit

There are a multitude ways to do this.  As an example look at the AD8044 and Figure 36.  Since the positive inputs are high impedance you can tie 2 of the inputs to the same source and generate 2 buffered outputs.

1) Drive op-amps from +-5V rails so the outputs work will go below ground.  PAL signals go negative.

2) Watch source impedance settings.  The source must always see a 75 Ohm load

3) Make sure the op-amp output has 2x gain and drives into 150 Ohm load just like figure 36.

There are many op-amps that can be used.  Just watch the gains, loading, bandwidth and be able to drive below ground and you should be good.  I can look at any solution you come up with.

Keep in mind, this is for DC coupled video.  If AC coupled then other issues come up.

Also the ADV9393 datasheet has some reference designs using the ADA4411