Looks more like an axle seal leak. Check to see if your brake master cylinder is low on fluid and have someone step hard on the brakes while you are watching that caliper for a leak...I think you'll find the brakes okay.
Underestimate me, that will be fun.
GREEN WORM RACING--since 1959
These are my opinions...YOU are responsible for YOUR decisions and YOUR outcomes...AND, my not arguing with you does not indicate agreement with your opinion.