I haven't tried since. Try the google YouTube forums.

I browse quickly for a GT or PSN to stat check. You can help me there since i helped you here?

Thanks, I'm guessing you read through my profile lol. I used it and it didn't work.

Use the new YT Studio for Thumbnails.

The default upload screen doesnt work anymore.

So I have my channel verified, and Im trying to upload a custom thumbnail to one of my videos. But when I upload it and press save changes, it automatically replaces the uploaded picture with one of the auto generated thumbnails. Can someone help me with this? I've tried various things and nothing worked. 

Custom Thumbnail That I Upload wont Work