Rabbi Avrohom Baruch Zachariash teaches the halachas of Chol Hamoed with the Mishnah Berurah (O.C. 539 & 540).

00:12 539:12 Purchases which are not permitted.
02:21 539:13 Loaning to gentiles
02:40 80% of people who are dissatisfied with a store continue to shop there.
05:20 People may not return to the shul when construction completes
07:10 After Govt. lockdowns people didn’t return to synagogues
09:22 Closing online shop could reduce Google rankings
14:40 Just-In-time Business with no stock
16:50 Pawn Shop
18:36 540:2 Taking down a portable Sukkah
21:33 Kicking off a piece of cement stuck to the floor
27:35 Inserting leather belt into buckle and securing with the metal teeth
30:25 Using ZIP ties on Shabbos
35:57 540:1 Building is prohibited