I know a few journalists really want to push this narrative, but I think the more it's been carefully studied, the more it's been debunked. E.g:

https://arxiv.org/pdf/1912.11211.pdf

"After conducting a detailed analysis of recommendations received by each channel type, we refute the popular radicalization claims. To the contrary, these data suggest that YouTubes recommendation algorithm actively discourages viewers from visiting radicalizing or extremist content. Instead, the algorithm is shown to favor mainstream media and cable news content over independent YouTube channels with slant towards left-leaning or politically neutral channels."