How to exploit the 'Let's Keep it Friendly' bet

In another example of node-locking from the new book Beyond GTO, Barry and Dara look at a common leak at low stakes.
This is the 'Let's Keep it Friendly' bet, whereby the player leads small with weak hands in an attempt to keep the post small.
Most players have the wrong instinct on how to defend against this type of bet.
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00:00:00 What is the 'Let's Keep It Friendly Bet?
00:01:30 GTO hand T72 two hearts 100% check
00:04:05 Example of a 'Let's Keep it Friendly' range
00:05:08 How to exploit the bet (and how not to exploit the bet)
00:08:45 What happens after we raise?
00:10:40 What about when Villain does NOT make the bet we expect them to make?
00:14:15 Summary

[@baalbaki1986]

At 8:52 this is the node where the range is 2nd and 3rd pair or middle pair and the range that you display is the overall range which has top pair which isnt in the rqnge at all when they lead 20% on the flop. My guess is they call 2md and middle pair and fold 3rd pair with no backdoor and overcard

[@oscarvelasco454]

How to adjust when villain underbluff the donk bet oop river after BC-XX-DB?. The first that comes to my mind is to overfold the river against passive tight players, but what about merging the turn bet with the middle part of my range instead of polarizing since they underraise and avoiding getting on a bluffcatch river situation against this type of players? Or does the solver prefers to realize my 2 outs equity against their top pairs range?

[@DerekDDuval]

The range you give villain, in my experience, is not at all accurate. Firstly, the villain that donk leads flops is not the same villain type that defends a gto range from the BB (They defend tighter).
But most important these flop donks include a lot of flush draws. Or at least some flush draws, you included zero?