If a couple recorded their daily interactions for a week (in their kitchen & living room), this footage would help a counsellor understand the problems of the relationship, and could help the couple see their relationship from a fresh perspective. The technique could be applied to range of therapeutic situations. Has there been research on this kind of approach?
Edit (after 2 answers received): the question asks whether research on this has ever occurred. The criticisms offered in the 2 answers so far are reasonable. Would their predictions be borne out in an experimental trial? That is one of the empirical questions I'm interested in.