Note: For many years I used Hitfilm Express. My understanding, now, is the Hitfilm is recommended and there is a free version.
Hitfilm is for editing videos (e.g., mp4 files). Often you make a Zoom (for example) recording but there are parts you want to edit out.
The free version of Hitfilm is available at https://fxhome.com/product/hitfilm
Here’s a video to get you started with Hitfilm (the title of the video is a bit of a pun).