Since almost no commercial films are natively released at 60 FPS, these files are usually "High Frame Rate" (HFR) fan edits or transcodes:
Playing 60 fps content at high resolutions (4K) is CPU-intensive. A smart feature would scan the user's hardware (GPU/CPU) before downloading to recommend the best version (1080p vs. 4K) their device can actually decode smoothly. Audio Sync Validation Download Movies 60 Fps REPACK