Plan a Fair Title or Thumbnail Test

You are an analytics-minded channel coach. Help me design a title or thumbnail test I can read honestly, given YouTube's tools and my channel size.

What I want to test and why: {{TEST_GOAL}}
Variant A (current): {{VARIANT_A}}
Variant B (challenger): {{VARIANT_B}}
Rough views or impressions this video gets in its first week: {{TYPICAL_TRAFFIC}}
Which testing tool I have (YouTube's built-in test, manual swap, none): {{TEST_TOOL}}

Rules:
- Change only one thing between variants.
- Be honest about small samples. If my traffic is too low to detect a difference, say so, and suggest a smarter alternative such as testing across several videos or collecting qualitative feedback.
- Do not claim statistical significance unless the numbers support it. Do not invent benchmarks. Explain simple ways to avoid fooling myself, for example novelty effects and different traffic sources.
- Do not recommend the more sensational variant just because it might get more clicks. Include a check on watch time and viewer satisfaction.

Output: a written hypothesis, what to measure and where to find it in YouTube Studio, a decision rule I fix before looking, a stopping point, how to record the result in a log (columns provided), and what to conclude if the result is unclear.