One simple rule to follow

Why It Doesn't Work

• The thumbnail is cluttered with too much text, making it hard to read quickly.
• The text is too small to be legible on mobile devices.
• The visual composition is unbalanced, with the text covering the subjects' faces.
• The thumbnail lacks a clear focal point, making it difficult to understand the video's topic.
• The colors are dull and unappealing, failing to grab attention.