Good Morning! Thanks for writing in. I apologize for the inconvenience this has caused you. This is a known issue and our engineers are working on this.
Meanwhile, you can try the following workaround here:
Please try the following to get the optimization to apply to your video:
On the Video Details page, scroll down and click on 'Show More' to expand all of YouTube's tools:
After expanding the page, try SEO Studio again from the TB menu underneath your thumbnail. This should now apply either a saved optimization draft or a new SEO application to your video.
Once the issue is resolved,
I'll update you here!
Thank you for your kind understanding and patience while we worked on this.