There are a number of video "Bricks" available. You can check a catalog company like Markertek. VAC makes unit gain blocks that are 1x2 and 1x4 bricks for around $150. You may also be able to find used Extron, Niles or VAC units on Ebay or other sources. I found VAC units at the local Electronic Flea market for $4 each and have used them for everything from Composite fanout to driving multiple power amps for Bass shakers. The units have a response of DC to 50 MHz. I should have bought all he had at that price.
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