There are light weight winches and high speed winches

There are light weight electric winches and high speed winches. These two characteristics are not found together in any commercially available system. I was told the Navy had something like this for towing sonar equipment behind submarines. Apparently it's very fast, but very large. Likewise for aircraft. These were ll hydraulic. Also, there are lots of DC winches : 12volt, 24 volt and 120 volt. The problem here is that generally the lower the voltage, the heavier the system -- for the same mount of work.
Powered winch or the traveller with a small gasoline engine as in an ultra lite aircraft, or else pull the camera back and forth with manpower, or a man powered multiple pulley system.