The following websites gives some details on possible equipment

http://www.harperavm.com/video-diary-room.html

It is not necessarily tailored for research (rather for family gatherings etc.), but might be used for research as well.

Some of the case studies using that particular method, kindly refer to the attached link;

• https://www.snapshotshirley.com/consultancy--evaluation
• http://journals.sagepub.com/doi/full/10.1177/160940690900800102
• https://eric.ed.gov/?id=EJ1036688

Thanks. Very helpful.