Video completion can help you understand attention. Read it alongside running time, metric definition and the campaign's purpose.
Establish the denominator
A percentage is useful only when its denominator is clear. Check whether the report compares completed plays with starts, impressions or another defined event. Use the platform's definition for the actual column and save it with the report.
In a hypothetical example, 200 completed plays from 1,000 starts equals 20 percent. Comparing those completions with another denominator produces a different figure. This explains arithmetic, not a normal result for AI videos or a platform.
Compare lengths thoughtfully
Short and long videos ask for different amounts of a viewer's time. A higher completion share on a short clip does not by itself establish more effective storytelling or better sales. Check when the product and main message appear.
A longer video may explain a function the customer needs to understand, making completion-only comparisons misleading. Define the purpose first. Testing a shorter version can be useful, but do not remove necessary information just to shorten it.
A hypothetical comparison of two edits
Imagine a backpack video that shows the product immediately in one version and starts with a longer travel scene in another. To investigate the opening, keep the remaining story as similar as practical in a defined test.
Changing length, offer, audience and ending simultaneously makes the opening difficult to isolate. Record exactly what changed. An interesting result can suggest another hypothesis without becoming a universal rule about every video's first seconds.
Watch the actual edits too. A chart can identify a passage worth investigating, but cannot alone explain whether editing is unclear, captions are hard to read or the product arrives too late.