Inessa, you should do a collaboration with "Vegabond" [62,000 Youtube subscribers] also known as "YegorTheRussian" with an additional [4,700] Youtube subscribers.
Yegor is a foriegn policy critic of the United States. He immigrated from Russia to the US at a young age, the son of two Russian PHds. He is a realestate entrepenuer who currently resides in California, where he produces content for both his Russian and English language youtube channels.
He has also been featured on Radio Saint Petersberg, source: https://www.instagram.com/p/BmAqmjhBGDT/?taken-by=veg53
I think there would be a chance to get a lot of cross exposure with his subscribers and your subscribers, which could greatly grow both of your channels reach. Here are his media links:
https://www.youtube.com/channel/UCO3O2bw8YVtryekGYVzop1A