Why does my video editor "cache my video to speed things up"?

omega3

Senior member
Feb 19, 2015
616
23
81
When using Videopad (video editor) on an XPS 13 laptop (i7-6600U, 8 GB, 256GB SSD) and adding a (long) movie clip to edit like a 7 minute 1080p mp4 file (934 MB in total size), it first wants to cache it showing me a green progress bar in the preview bar that takes forever to load. When I move my mouse over the progress bar, it says "to speed things up, we are caching your video. Watch the preview, after this progress bar is finished".

The strange thing is that I can still start editing even before the progress bar is finished I think, but why does this progress bar take forever like minutes to load? When looking in Task Manager neither my CPU or RAM (8GB) are used to its maximum, so why is this progress bar so slow? Is it maybe my older i7-6600U processor or what exactly? And why does it seem that i can still start editing even before the progress bar is done? Not sure if i can do everything however so confused about the slow loading progress bar.