Videos are listed below. They are also part of two overlapping playlists: Hungry Microbiome Playlist (11 videos) and The Gut Microbiome (7 videos).
The videos are technically rich but I was able to grasp the big picture. Worth watching. They complement Dr Greger's microbiome videos nicely.
(4 mins) A cool animation video explaining how resistant starch operates inside our guts! Technically detailed.
At offset 7:47 in this video, I found simple explanations for these questions: (a) How is starch digested? (b) What are the 4 types of resistant starch?
RS1: Legumes and partially milled grains
RS2: Raw potato and unripe banana
RS3: Heating and cooling (potatoes and sweet potatoes)
RS4: Chemically modified starch emerging from industrial processing