Google has developed new experiments for video. Over the next several weeks these will launch globally.
Google believes that it shouldn’t be difficult to get insights to guide you. Running a YouTube experiment should start with a question or hypotheses. Within weeks you should start to get an idea of what works and what doesn’t.
The ultimate goal of your testing should be to find what works best for your brand on a broader scale. Three easy experiments you could try are: supersize text, tightening framing and changes in call to action placement.