Can We Reinstate Lost Traditions, Such As Techeiles? July 10, 2018 – כ״ז בתמוז תשע״ח by HyehudiRav Hershel Schachter on TekheletPublished on Aug 25, 2013Rav Schachter talks about three aspects of tekhelet: (1) Should one wear it even if it is only a safek (doubt)? (2) Can we reinstate a halacha when the tradition was lost? (3) How does he suggest one tie the tekhelet?From YouTube, here.
