Welcome Zachary Panczenko,
Thanks for reaching out to Microsoft Q&A Forum. I understand you want to set a moving or animated desktop background on your Windows 11 HP computer without installing third-party software.
Please let me know whether you have already tried the options provided by Q&A Assist.
Do you want to use an actual video or GIF as the background, or would changing still images at short intervals meet your needs? Also, does the moving background need to appear on the desktop or only on the lock screen?
In the meantime, you can try these workaround steps:
- Create a new folder and place the pictures you want to use as backgrounds inside it
- For a smoother sequence, use images with the same dimensions and arrange their filenames in order
- Right-click an empty area of the desktop and select Personalize
- Select Background, and then choose Slideshow under Personalize your background
- Select Browse and choose the folder containing your pictures
- Set Change picture every to the shortest interval available
- Turn on Shuffle the picture order if the sequence does not matter.
- Choose an appropriate fit, such as Fill, to cover the desktop.
- If you specifically need a video or GIF to play continuously as the desktop wallpaper, submit this request through Feedback Hub.
- Press Windows + F.
- Select Suggest a feature.
- Describe the animated desktop background option you would like Windows to provide.
- Complete and submit the feedback.
I hope the step work for your issue.