Uneven refresh rate on display

I am using Ubuntu 18.04 currently, but I was facing the same issue on Ubuntu 16.04 also.

The issue is that there seem to be an unequal refresh rate on different parts of my display. So when I am watching a video, I can observe a sort of fluctuating horizontal line, above which the video is a few frames ahead or behind the part below the line. The line keeps changing constantly, so it’s not an error with a fixed portion of the screen. The issue is present constantly, so even when I am scrolling through some website it is there, but it is much less observable naturally.

Here is a drive link which contains a recording of my laptop screen displaying a video, and the link of the same video for reference –
https://drive.google.com/drive/folders/1yQwudmSLzeuhYZxtQIakIkHX7Yrwuy33?usp=sharing
(I recommend downloading the video if it is unclear, as I have recorded in 1080p but drive is only displaying 360p)

I do not experience the same issue on my Dual Booted Windows 10. I also tried screen recording and sending the clip to another device. On that device, this issue was not visible in the clip.
Any help with this will be appreciated.

The following is the output of sudo lshw -c video –

  *-display                 
       description: VGA compatible controller
       product: NVIDIA Corporation
       vendor: NVIDIA Corporation
       physical id: 0
       bus info: pci@0000:01:00.0
       version: a1
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress vga_controller bus_master cap_list rom
       configuration: driver=nvidia latency=0
       resources: irq:141 memory:a3000000-a3ffffff memory:90000000-9fffffff memory:a0000000-a1ffffff ioport:4000(size=128) memory:a4080000-a40fffff
  *-display
       description: VGA compatible controller
       product: Intel Corporation
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       version: 00
       width: 64 bits
       clock: 33MHz
       capabilities: pciexpress msi pm vga_controller bus_master cap_list rom
       configuration: driver=i915 latency=0
       resources: irq:139 memory:a2000000-a2ffffff memory:b0000000-bfffffff ioport:5000(size=64) memory:c0000-dffff

If any other output is required for debugging please let me know. Thanks!