Orchid related questions, answered by AOS experts.
Note the specific times below if you wish to watch or listen to those topics.

06:23 dendrobium aberrans silvery leaf coloration
11:35 Repotting and roots
16:54 Phalaenopsis when to repot and fertilize
22:55 Phalaenopsis roots rotting or not
25:17 Bulbophyllum leaf damage and discoloration 
28:17 Phalaenopsis aerial roots  and repotting
31:55 Bulbophyllum leaf yellowing
35:10 Laelia anceps won’t bloom
37:48 Snow mold everything you need to know
43:14 Dendrobium leaf coloration
44:36 Insect growth regulators
51:04 Bloom damage is something eating my bloom
52:17 Cattleya repotting in clay
56:16 Fungus damage on leaves
58:41 Snow mold more information
59:36 Insect infestation treatment
1:08:33 Vanda treatment for Fusarium fungus