FFMPEG. I converted the file to AV1. x265 ist also good and even better than AV1 for files with a lot of noise/film grain. You can use FFMPEG from the command prompt and many programs use it in the background, but I can really recommend
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. It's a bit more complicated than Drag&Drop of course, you need to know what you are doing. I'm afraid there is no way to really have an automated program that does everything for you automatically AND have the best compression at the same time. Perhaps we will get there one day using AI, but not yet.