Whoa! I found 2 video AGC chips you might be interested in. They are the MAX7452 and the AN3916. Never used either of these chips so I don't know much about them. The Maxim chip is available only in an SO-EP package- which, I think, is quite small. The AN3916 is a sip package. Both operate off +5. Both could be used for future video input mods for analog TV's. The AN3916 has an H OUT pin.
Maxim used to be quite liberal for free samples but they are now owned by Analog Devices who might be anal about it. I saw both chips on Ebay.
An interesting PDF:
https://www.analog.com/media/en/tech...tes/an57fa.pdf