A quick answer
Compare CTR across similar traffic sources and time windows. Improve the image's message and title together. A design cannot guarantee higher CTR; a test needs responses from real viewers.
Check context
Audience and traffic source affect the comparison.
Review the promise
The video should deliver what the image and title suggest.
Name the difference
Compare ideas rather than barely visible details.
How to approach it
Record a baseline
Note the time window and traffic source.
Identify the problem
Look for unclear messaging or small lettering.
Develop a variation
Create a different idea with a suitable title.
Review the result
Consider the test report and watch time.
Two CTR numbers are not enough
One video may reach regular viewers while another reaches unfamiliar people. Search and the home feed also present different situations.
Compare similar time windows. Record title changes so you can interpret the difference later.
Test a specific concern
Is the subject too small? Does the title explain the problem? Create a variation that addresses your question visibly.
The Studio prepares drafts and title concepts. It does not measure live channel CTR. YouTube's test considers watch time.
Good to know
What is a good CTR?
There is no fixed target for every video. Compare similar content and traffic sources on your channel.
Does the Studio promise more clicks?
No. It helps create and revise designs. Test their effect with your audience.