I have Topaz Labs Video Enhance AI and have been converting hundreds of hours of my old Digital8/DV home videos. You can learn about this software here:
If you can’t justify the cost of this software, I’d be glad to convert some videos for you. If the video is already high quality (like a 720p HD clip from a phone), converting it up to 1080p HD can look really good. If it’s older video (SD footage or old analog VHS stuff), it may not be quite as impressive, but still better than if you just scaled up the size in a video editor.
Drop me a note here, or you can check out samples at my Fiverr listing: