Good luck! I don’t blame you for not downloading from sketchy looking places.

The youtube search problem is a shame. Five years ago i had trouble with my washing machine and found a video of a guy with the exact model and exact issue with agitation. Youtube used to be good for that.

https://elektrotanya.com/showresult?what=beko wmd&kategoria=&kat2=all

Nothing here for your specific model, but you might have luck asking there?

https://audiokarma.org/forums/index.php?threads/are-online-download-sites-for-manuals-reliable.732804/ Conversation here makes me think it’s a legit source of manuals.