I think I saw it the first time on Holahan and Big Chuck late Friday night kids horror flick show. Cleveland channel 8
https://www.imdb.com/title/tt0062168/
I bet that’s where I first saw it, too! Day of the Triffids was the most memorable though. LOL. A couple classmates got to be in the audience once despite the algebra teacher that threatened an F if they missed the test. Happy memories...!