Greasy Fork

Ok but for the exception of the download function, which doesn't even work. I commented out this "mybutton" section and dumb dumb the creator shoulda done the same.

I am using the latest version of chrome. No such issue found. To make the script work correctly, if you are using any Adblocker, please add youtube.com to the whitelist in the Adblocker settings.

I have been using my own script everyday. No problem is found so far.
Thanks for your comment though.