Rabbi Avrohom Baruch Zachariash teaches the halachas of Chol Hamoed with the Mishnah Berurah (O.C. 540).
00:15 Can a religious Jew open a shop in a 100% secular neighborhood?
04:00 Can a secular Jew cook for himself on Yom Tov?
10:00 A Jew DOES open his shop in a secular neighborhood – can a religious Jew buy something there for Yom Tov?
