If you are trying to watch videos in a web browser (like Chrome or Edge) and they are lagging: Go to your browser > System .

If a specific .mp4 file is stuttering or showing a black screen, it might be using a codec your hardware doesn't like (such as H.265/HEVC).

When converting, look for a preset like "Fast 1080p30" or "Web Optimized" to ensure smooth playback on most devices. 4. Hardware Acceleration Settings

Note: If the video is still glitchy, try turning it temporarily to see if your CPU handles it better than the UHD 620. 5. Check for "HEVC Video Extensions"