I can give you access
Note: This video is both age restricted and blocked due to copyright grounds on YouTube.
I would just try this through their video file feature.
Be sure it’s MP4 and you have the SRT file. I haven’t used it yet so I don’t know if it has to be the Russian SRT, but I’m pretty sure it has to be the SRT of your target language.
Also, for YouTube videos (any video content really), it can take LR some time to grab the subs from the content (as long as they are available on the video).
In these cases, I just keep refreshing the page until the sub options show up.