search for "ocr video" (ocr = optical character recognition)
these are programs that can take video or image and output normal text data,
i.e. analyze the pixels to determine which letters are present and give that to you in editable text format.
(yandex/google image translation do this, but you can find program/site that is more flexible for your needs)
then you can feed that text, possibly after editing for format etc, into any translator like yandex or deepl.
one of the programs that came up even seemed to be russian although i didn't investigate further as i don't know RU.
or just send the japanese person who makes these videos random harassing messages in russian
demanding they use normal subtitle text instead of "graphic" text that needs OCR to analyze/extract.