Hi @re_search1901 , thanks for replying.
I like your name, because I also do a lot of research.

And by the way, there is significant evidence of video feedback being helpful, at least when used under the supervision of a therapist:
1) The VideoTalk method is a psychotherapy approach where patients create and use self-made videos (often with smartphones) at home to record themselves in daily life, especially in problematic situations, and then review these videos with their therapist to gain self-observation, activate emotions, and change dysfunctional coping strategies, building a bridge between therapy and real life.
A feasibility study of “video-assisted group schema therapy” for borderline personality disorder that adds the VideoTalk method and reports that using video was experienced as effective and helped bring more emotionally intensive material into session:
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Video-assisted Group Schema Therapy for Borderline Personality Disorder – a Feasibility Study2) There are a few control studies about child development and behavior that used therapist-guided video-feedback interventions where families are videotaped in real-life home routines. Some of them have shown a significant improvement in the intervention group over the control group. The following study was specific for mothers with difficulties consistent with personality disorders, often related to a history of complex trauma, and the result was a risk-ratio reduction of 1.9:
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Video feedback parent‐infant intervention for mothers experiencing enduring difficulties in managing emotions and relationships: A randomised controlled feasibility trial3) Finally, there is a case study named the “bug-in-the-eye” DBT supervision work, where a supervisor observes the DBT session live (typically via video) and gives the therapist immediate coaching through an earpiece, and the authors report it as useful and acceptable in a BPD case.
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The Use of “Bug-in-the-Eye” Live Supervision for Training in Dialectical Behavior Therapy: A Case Study