I'm usually fine with a little flare. In your video, it's a bit jerky and is a bit distracting. That movement will make the removal challenging as you are chasing a moving target.
I was going to say same, sometimes creators often add these flares so the Lens Flare will allow you to take control over all the elements and spruce it up a bit and make it look presentable.
How to add lens flare to your videos in Davinci...