Filming the trainings

Hello everyone,,

I am the son of an old Turkish Basketball player; Yalcin Granit.
en.wikipedia.org/wiki/Yalç?n_Granit

My father is a big fan of your website. Nowadays he is been looking for an article about the importance of filming basketball trainings (not games) and make the players watch themselves and see their own progress or mistakes. I couldnt find anything on the web. By chance, do you remember any article about this topic?

Thank you very much in advance..

Best regards,
Ali Granit

Sorry I don't remember anything about that topic.