There was a discussion in another thread a while back about cameras and GDPR, it was off topic for that thread and the Op asked it to be closed so thought it would be best to start a new thread.
The Data Protection Commissioner, Helen Dixon, has addressed the issue in
an article on The Journal
In a nutshell, cameras should only within the perimeter of your home and the footage only to be used by the owner, if you go beyond this then you become a data controller and have all the responsibilities that goes also and if you go beyond that you could become a data controller. The bit that confuses me is where the perimeter of a home is, is that the building or are driveways/yards included, I think it's clear that paths/roads are not.