Even great fonts fail if implemented poorly. This comprehensive reference covers everything from ideal font sizes for 4K vs. mobile viewing to color combinations that pop without straining eyes. Learn professional subtitle formatting rules, safe area boundaries for text placement, and how long on-screen text should stay visible. We debunk common myths about YouTube text and provide actionable checklists to ensure your fonts always enhance rather than distract from your content. Perfect for creators wanting to polish their video production quality.