... There are many reasons to do this, but you may want to make each segment a chapter, for easy review without the time and effort to find the right segment. It also allows the video to be more future proof, allowing easy copy and pasting, and easier sorting, into future videos. Indexing each segment also allows for text-based search and play and allows for easier automating the edits of the videos.
The time between segments needs a little more delay so that a person watching doesn't get surprised by the transition between them. There are many ways to highlight the transitions but by far the easiest is to allow a few more milliseconds between the segments. A short transitional video is another way to do this but fading, both in and out, is important for allowing viewers' thoughts to make the transitions comfortably.
... There are many reasons to do this, but you may want to make each segment a chapter, for easy review without the time and effort to find the right segment. It also allows the video to be more future proof, allowing easy copy and pasting, and easier sorting, into future videos. Indexing each segment also allows for text-based search and play and allows for easier automating the edits of the videos.
The time between segments needs a little more delay so that a person watching doesn't get surprised by the transition between them. There are many ways to highlight the transitions but by far the easiest is to allow a few more milliseconds between the segments. A short transitional video is another way to do this but fading, both in and out, is important for allowing viewers' thoughts to make the transitions comfortably.