A cannabis dispensary owned by Woody Harrelson and Bill Maher was burglarized over the weekend … and the smash-and-grab is all on video.

Surveillance footage shows masked burglars in hoodies getting out of a car in front of The Weeds WeHo in West Hollywood … shattering a glass window to make entry, then filling bags with merchandise before getting the hell out of dodge.

Elliot Lewis, who owns a cannabis shop of his own in town, says the burglary happened at 4:30 AM Saturday … and he claims the same crew hit another weed shop in Santa Monica, ERBA, the following night.

Video also shows a smash-and-grab at ERBA … and it appears a security guard was there … with Lewis claiming the guard fired a gun at the thieves.

The Woods officially opened just over 3 years ago in WeHo … Woody and Bill’s joint sells marijuana products and there are private smoking rooms where stoners can blaze up with bongs, dab rigs or papers. The place includes a bar serving THC-infused drinks.