The "Send to Youtube" function does not work. Only audio without video is downloaded

Known issue, but none to discuss here on musescore.org

You are on musescore.org. You need to go to musescore.com. See the following information:

How and where to ask for support

For additional information, see the following:
https://musescore.org/en/faq#faq-314712
https://musescore.org/en/faq#faq-20657
https://musescore.org/en/faq#faq-359393
https://musescore.org/en/node/314712
https://musescore.com/user/32018844/subscription