

It sounds like you are also possibly overheating. You don’t have hardware decoding for av1 on that computer so it’s all cpu work. But from my extensive use and testing with AV1 there is nothing about your hardware that should fail to play back 1080p 30fps av1 video.
Spare yourself a lot of wasted disk space, Windows stupidity, and RAM by just using any mainline Linux distro (e.g. Ubuntu) instead of Windows for the guest. I don’t even mean a headless Linux. You can keep the GUI if you prefer and want. That will still be a small fraction of the ram, compute, and disk space for the VM than a Windows guest.
And a tip for the technique: don’t download torrents into the virtual hard drive for the VM. Download into a shared/mounted directory.