Nvidia recently rolled out upscaling in video too with new drivers and latest Chrome/Edge [1]. Honestly, it's pretty decent from my usage. Required a 3080 or above, however.
1. https://arstechnica.com/gadgets/2023/03/nvidias-new-ai-upsca...
1. https://arstechnica.com/gadgets/2023/03/nvidias-new-ai-upsca...
There are much better options for non-realtime.