[Neil Orman] ” hear you and usually don’t try to reduce file size”
I do for web use or for sending clients screening copies via Dropbox or some equivalent.
[Neil Orman] “I can get file sizes of 10+ gigbytes. So that starts to fill up my external hard-drive pretty fast”
You could make proxies. On Mac I’d use Apple ProRes Proxy. On Windows it may depend on the NLE but low quality DNxHD or maybe MJPEG… something an NLE can handle more easily than H.264.
You mention “viewers” but it’s unclear how you are delivering to them. That might be web (and delivery specs may vary by CDN) or it may be handing out USB Thumb Drives.
If a CDN is delivering them they will usually recompress them so you actually want to give them much larger higher quality files.
If you’re delivering thumb drives you have to consider the broad range of computers.
BTW some deliver “mobile” files for iOS or Android playback and that may be another spec depending on the range of devices.
If you look at the top of this forum you’ll see a sticky post I made. How to get FASTEST compression help – PLEASE READ it includes all the things you need to consider including the Target.