jerking videos

When you post computer information, please summarize to be easier to read
Operating System: Microsoft Windows 10 Professional (x64) Build 19042.685 (20H2)
Intel(R) Core(TM) i5-7600 CPU @ 3.50GHz Number Of Processor Cores: 4
--i5 with 4 cores will not edit 4k video very well
Motherboard Model: ASUS MAXIMUS IX EXTREME
Motherboard Slots: 5xPCI Express x1, 1xPCI Express x2, 7xPCI Express x4, 1xPCI Express x8, 1xPCI Express x16
Device Description: Onboard IGD Device Type: Video Adapter Device Status: Enabled
--this says you have onboard video, most likely an Intel video chip
Memory Device 8192 MBytes BANK 0
Memory Device 0 MBytes BANK 1
Memory Device 8192 MBytes BANK 2
Memory Device 0 MBytes BANK 3
--this says you have a total of 16Gig of ram
NVIDIA GeForce GTX 980 Ti Video Memory: 6144 MBytes of GDDR5 SDRAM
--you need to make sure that the onboard video 'chip' is not being used
Drive Model: Seagate ST4000DM004-2CV104 Media Rotation Rate: 5425 RPM
--no video of any kind is going to do well on a 5400 rpm drive
Drive Model: Seagate ST3500418AS Media Rotation Rate: 7200 RPM
--copy video on/off for work, use 5400 rpm drive only for backup
--you will need to delete temporary files after completing each project

If your GTX980 is not in the list, fill out the beta form to see if the PrE staff will contact you with the utitility program to enable gpu acceleration https://helpx.adobe.com/premiere-elements/using/gpu-acceleration.html

This is about PPro, but if your computer is using the onboard video adapter instead of the GTX980 you should read

Use BIOS https://community.adobe.com/t5/Premiere-Pro/quot-could-not-find-any-capable-video-play-modules-quot-error/td-p/4270497 to select a display adapter
-http://www.anandtech.com/show/4839/mobile-gpu-faceoff-amd-dynamic-switchable-graphics-vs-nvidia-optimus-technology/2

For example, what I have
Windows 10 Pro, currently at version 20H2 - Premiere Elements 2021
i7-4930k 3.4Ghz 6 Core CPU on Asus Sabertooth X79 Motherboard with Corsair 2x16Gig Ram
Samsung 256Gig SSD Boot Win10 64bit Pro and ALL program installs, about 80Gig is used
Crucial M550 512G SSD for all input... video files and pictures from camera
Crucial M550 256G SSD for temporary and video project files
Crucial M550 128G SSD for all exported output video files
MSI 2Gig GTX760 video adapter, nvidia driver 432.00
I edit 1280x720 video from a Canon SX510 camera, and it plays 'as smooth as butter'

You need to provide details for anyone to help
Mac or Windows and exact version of the operating system
Premiere Elements version
CPU brand and model and clock speed
Video adapter brand and model and driver version and amount of video ram
Number and size and type of hard drives
What kind of video are you editing?
-hint 4k video on an underpowered computer will not play well