Guidelines 03/2019 on processing of personal data through video devices
Section 4.1 Disclosure of video footage to third parties in general
50. Disclosure is defined in Article 4 (2) as transmission (e.g. individual communication), dissemination (e.g. publishing online) or otherwise making available. Third parties are defined in Article 4 (10). Where disclosure is made to third countries or international organisations, the special provisions of Article 44 et seq. also apply.
51. Any disclosure of personal data is a separate kind of processing of personal data for which the controller needs to have a legal basis in Article 6.
52 Example: A controller who wishes to upload a recording to the Internet needs to rely on a legal basis for that processing, for instance by obtaining consent from the data subject according to Article 6 (1) (a).
53. The transmission of video footage to third parties for the purpose other than that for which the data has been collected is possible under the rules of Article 6 (4)
Example: Video surveillance of a barrier (at a parking lot) is installed for the purpose of resolving damages. A damage occurs and the recording is transferred to a lawyer to pursue a case. In this case the purpose for recording is the same as the one for transferring.
Example: Video surveillance of a barrier (at a parking lot) is installed for the purpose of resolving damages. The recording is published online for pure amusement reasons. In this case the purpose has changed and is not compatible with the initial purpose. It would furthermore be problematic to identify a legal basis for that processing (publishing).
55. A third party recipient will have to make its own legal analysis, in particular identifying its legal basis under Article 6 for his processing (e.g. receiving the material).