Digital signal into the video cable
Reading the datasheet, the amplifier is unity gain stable, so can be used with G=+1, where it should give you a -3dB BW of 250MHz. You will want your data rate to be somewhat slower than this to get good pulse shape.

The data sheet specifications expressed in video specific terms (diff gain, diff phase), have only been measured in the G=+2 configuration, as that's the way that most people will configure it for video.

As you are (presumably) not interested in meeting a particular video spec, you can choose which configuration you like.