The resolution of your video file directly dictates how subtitles are rendered, especially if they are "hardcoded" or image-based (like VobSub): Text Clarity:
The higher resolution allows for much sharper, "vector-like" text rendering. This reduces eye strain during long viewing sessions and ensures that the text doesn't obscure the high-definition background details. Performance and Storage Prison Break Season 2 Subtitles 720p Vs 1080p