The "th" sound

[Odessa Dawn]

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farther / f r r/
further / f r r/

farther/ˈfɑr·ðər/
further/ˈfɜr·ðər/

We have in dictionaries voiced th while here it is being pronounced as voiceless th? It is at ( 08:09).
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[5jj]

We have in dictionaries voiced th while here it is being pronounced as voiceless th? It is at ( 08:09).
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This 'teacher' is giving a bad model for the pronunciation of farther/further. She also unhelpfully suggests that you have to stick your tongue right out to pronounce the sounds that she is talking about. You don't; you would look rather strange if you did.