Urinating in a public place is not a criminal offence in Canada, regardless of the context, unless the elements of an offence are present as set out the Criminal Code, such as exposure/harassment. Some cities in Ontario, like Brampton and Toronto, have municipal bylaws that assess a fine for public urination, but these are not enforceable after the fact.
I would caution you regarding a potential privacy issue regarding the video and a confrontation, especially if the employee was unaware of the camera and the recording.
A direct conversation with the employee in question about the incident would probably be your best initial step, remind the employee that you have bathroom facilities and that they shouldn’t be urinating on the property.
