Removing a dust from 3 videos

I have 3 videos (20 min each), and need to remove all dust particles (5-7, not sure). It happened because there were dust particles on camera's sensor. You can create a mask for each dust, and blur it or use another efficient methods which does not harm the video quality.

Example: https://www.google.com/url?sa=t&source=web&rct=j&url=https://m.youtube.com/watch%3Fv%3Du1uLjO7sxgA&ved=2ahUKEwi1qoGZ3aj7AhWR-2EKHX-6AmcQFnoECA4QBA&usg=AOvVaw2ldVt_cjwguvHfR56lF-ZP

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