Is it possible to create a new product and then add the embedded youtube code? I would like to test this further as everything from our side looks like it should work OK.
I have attempted this but the ACF fields do not show up.
The video is added using Custom Tabs and not ACF Fields.
To resolve this try the following:
1. Go to products and edit your product in the default language
2. Use the language switcher and switch to the translation (dismiss warning)
3. Go to Custom Tabs -> add the video URL in the code tab and save tabs
4. Update product