The main issue besides voltage levels you’ll have is that most audio stuff isn’t designed to go too far outside audio frequency range. This means your oscillators probably won’t be able to generate horizontal patterns and things like filters and other processors will tend to smudge video signals. You’ll want some oscillators (Cadet IX and/or Castle 010) and maybe ramp generators (Cadet IV) to generate horizontal and vertical patterns. If you want to play with camera processing and feedback, using your non-LZX LFOs etc. for animation, there’s a ton of fun to be had there too, and in that case you might get more mileage out of processing modules like Cadet VI, VII, VIII, or X. Keyers and faders especially are useful in camera processing or pattern synthesis.