Whatever the software, you simply need to be able to separate the audio from the video track. Most above-minimum video editors should allow you to do that. In mine (cyberlink), I can actually render the video as an audio file. (of course, there's no video info in that file). Then take the audio to your DAW and do what your need to do with it. Render it out as a .wav.

Take the improved audio and re-couple it with the video. This can be done as simply as muting the original audio and placing it on a separate audio track in your video editor. Once it's there, you can do your edits. I take it you mean cutting out certain parts of the final product to make it more watchable and flow better.

I think if you do it this way, you'll be less encumbered with new software. In any case, in ANY "video" multimedia file, there is a VIDEO component and an AUDIO component. There's no real need to try to work with both at the same time, imo. Once the audio is fixed, and replaced, it will ride along with any edits you make to the ENTIRE multimedia.

BIAB 2021 Audiophile. Windows 10 64bit. Songwriter, lyricist, composer(?) loving all styles. Some pre-BIAB music from Farfetched Tangmo Band's first CD. https://alonetone.com/tangmo/playlists/close-to-the-ground