Is it illegal for the owner to send a property customer service video to the group?

May be illegal. Generally speaking, if the property customer service video involves the owner's personal privacy information, such as name, phone number, address, etc. The group owner sends the video to the group without the consent of the relevant personnel, which may infringe on the privacy of others and constitute infringement. If the property customer service video involves the commercial secrets or confidential information of the property company, the owner will send the video to the group without authorization, which may constitute a leak and involve legal responsibility.