I can't say about Yandex because I haven't used it much, but I have used Google and its services enough to know that it may appear neutral but its services do reflect politics of its origin country. For an outsider, I doubt Yandex is going to be any different than Google in those matters.
It's a major tech company service based in Russia, so presumably controlled by the government of Russia.
But the results produces for a query like "watch (obscure movie) online stream" are far better than what Google or Bing produces. If you need to check a scene of a specific episode of an obscure TV show, it's the fastest method (but happy to hear alternatives).
Also, the websites it links to aren't operated by the government of Russia.
Nothing if you know what you're doing.
> Weekly Yandex astroturfers strike again.
People doing things you don't like doesn't mean they don't exist.