Modern AI tools can "reconstruct" missing details to make videos look professional.

: A great choice for fixing slight out-of-focus shots and motion blur directly in your browser. 2. Basic Quick Fixes (No Download Required)

: Canva's Video Upscaler offers a free, easy-to-use slider for basic quality refinement. 3. Advanced Editing Features

If you want to manually sharpen the footage for a specific look: