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> For right-leaning users, video recommendations are more likely to come from channels that share political extremism, conspiracy theories and otherwise problematic content. Recommendations for left-leaning users on YouTube were markedly fewer, researchers said.

This depends on the researcher's definitions of 'extremism' and 'conspiracy theories'.

- Recently we've seen many left wing people state that disassembling people in front of their families - surely an 'extreme' act - is a 'beautiful act of resistance', and that calls for genocide against Jewish people (surely also 'extreme') may not constitute hate speech in some contexts.

- For the last 7 years we've had many people believe in the Russiagate conspiracy theory.

- I'm not sure "problematic" has any real meaning.