Use a differential Am
Dear friend:
You can use a differential amplifier using a matched array of transistors (eg, CA3018). With proper design you can get a CMRR better than 60db. Also you can provide high frequency response compensation, what is highly desirible in video systems.
Another advantage of the Diff Amp over the passive transform is perfect low frequency response, that you can't get from a transform.
Hope to help you,
NandoPG