Slow motion flickering
Why is slow motion flickering in my iPhone 8 Plus
Why is slow motion flickering in my iPhone 8 Plus
Hey Waseempasha21,
If you haven't already, restart your iPhone then try the slow motion feature again with your video. Restarting can resolve many odd issues: Restart your iPhone - Apple Support
If the behavior continues, do you use a case with your iPhone? If so, remove it to see if that helps as some case material can cause interference as shown here: If the camera or flash on your iPhone, iPad, or iPod touch isn't working - Apple Support
Keep us posted.
Take care!
This problem occurs because of external camera protectors or guards which restrict the camera to deliver to its full potential.
Slow motion flickering