No, movies and music files are already compressed, so compressing them further won’t gain anything. In fact it will actually increase the file size because compressed files require some overhead. So even winrar won’t help, though it might be convenient to have one big file with everything in it (you can even break it up into multiple part files.)

As most have said, doubling up compression won’t usually get you much.

However, video compression is usually designed to facilitate performance of sequential reads because videos are typically played beginning to end, so theoretically there may be ways to compress them more if you’re willing to make sacrifices there.

I doubt RAR is the way to do it, though. It just hasn’t been designed for this kind of data.

Maybe there’s a video compression format out there designed specifically for archival storage, but I’m not aware of it.

ISO won’t get you any further compression, that’s for sure.

You could certainly test this out yourself and let us know if you get any space savings.

No. And that’s a bad plan. Uncompressed them, and then reencode them to h256/x265 with handbrake (use the SuperHQ 1080p setting). That’s as compressed as they’ll get and you can still watch them without having to unzip them first

just throw away every second frame. repeat for more compression. at some point you ll be left with a couple of pictures to remember the story and replay it faithfully in your head.

you welcome !

If you can sacrifice quality, you can encode the videos at a lower bitrate, but that is lossy compression, not lossless. Also, if your videos are in h.264 codec, then transcoding them to h.265 and preserving the quality may be a way to get the files smaller. You would use a tool meant for video, like Handbrake for this, and not winrar or other generic compression tool.

If you want to compress video files, you’ll need to reencode them. Maybe using something like HEVC (High Efficiency Video Codec). But for 80GB of videos, you’ll be there for a while and probably won’t shrink them enough to be worth it. It would likely take less time to simply re-download the files later, even with a mediocre internet connection. In practical terms, you won’t get that 80GB to be any smaller.

ISOs don’t compress anything, as far as I know, or at least not by default. I think they’re basically just a container.

To reencode your videos, you can use the free HandBrake.

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Just buy another hard drive, damn.

80 gb is not a lot for movies. My average 4K movie is between 60 and 80 gb per movie. If you start encoding and compressing them you start seing compression artifacts and reduction in quality very quickly.

My advice: don’t compress movies if you can. Just get more storage. Storage is relatively cheap these days.

Bottom line, winrar isn’t the tool to compress video files. In short it’s more complex, but zipping, raring etc… those methods are all the ideal way to compress executables, word documents etc… In short, most likely your video files are already compressed as much as they can be without loss of quality. However if you were to attempt to make them smaller, most likely you’d use something like handbrake or some other video codec converter to actually try to shrink them.