What's the best working format for video making? Good day.
I'm trying learning Premiere, but at the moment i'm using Corel Video Studio to make video footage. 

I noticed cpu-spiking and freezing editing my video (with both programs): in particular i'm using source video x264 econded with Handbrake. 

My cpu is a Ryzen 5 1600 six cores with 8gb ram. 

I'm working on a mechanical HDD.

So my question is: what's the best and low impact video format for working/editing ?
The best format is using a temporal file of lower resolution.

Make a copy of your source material at half size, which will become 1/4 of the weight, then use some format that is compatible with your program and use it for the editing process, when it is ready, relink the videos to the original ones for the final render and done. Make some tests and see if the keyframes are working fine for small clips.

If you only want to change the source material to another format you are degrading your video.