Change Gallery

The change gallery shows all the changes in title, thumbnail, and A/B testing since the video was uploaded.

Here's how:
1. Pick a channel.
2. Go to the videos tab.
3. Choose any video from the list.
4. Click the green "open change gallery" button on the left.
5. Review thumbnail, title changes, or A/B tests made since upload.

Useful articles:

Thumbnail & Title changes

A/B Testing

Chrome Extension

Pro Tools 

Projections

Compare Channels