Got it working by editing to match the english page entry in mysql..
UPDATE wp_postmeta
SET meta_value
= ‘a:12:{s:5:\”@type\”;s:11:\”VideoObject\”;s:8:\”metadata\”;a:8:{s:5:\”title\”;s:5:\”Video\” ………….. :\”thumbnailUrl\”;s:75:\”https://redacted/thumbnail-in-question.jpg\”
then did a nothing-edit on the page and the thumbnailurl updated to correct one.
Hello,
Thank you for contacting Rank Math and bringing your concern to our attention. I’m sorry for any inconvenience this issue may have caused you.
The Autogenerate image option is only available with Rank Math PRO but the account you have used to open this ticket is the Rank Math free version.
Can you please search and forward a receipt from FastSpring.com or the email address you used to purchase so we can locate your account and verify it?
Looking forward to helping you.
Thank you.
Hello,
I have updated the sensitive data as requested. Can you please check further?
Thank you.
Hello,
We can see that the video thumbnails are automatically generated in the video sitemap:
Thank you for providing the email address. To avoid any confusion in the future, would you like to merge these two accounts?
If so, please tell us the preferred email address and we will do the needful.
We really look forward to helping you.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.