Where can I download movies and documentaries with audio tracks in 2 languages?

Question

Video

Interested in films, especially all sorts of documentaries, so that there are 2 audio tracks - Russian and original, in English, so that subtitles can also be included. This is the MKV format in my opinion, right?

Answer 1

then the MKV format in my opinion, right?

This is any format that supports multiple audio tracks in one file, including MKV.
And you can download it on [blocked by RKN] or on [blocked by RKN], in general, Google will help.