Bring each of your previously exported (produced) videos into VP and place all on the sequence in the desired order.
At each split point ADD BLANK clip, from the menu bar. The color and length of the blank clip can be altered by using the controls that are under the preview window.
To accurately target each split point use the either the right- or left-facing buttons under the sequence window. These buttons have a chevron that points to two vertical lines. ||< and >||
Then burn a DVD Movie disk with or without a menu. The result will be your videos separated by the blank clip.
As a test, to avoid "coasters" burn to a rewriteable disc...
or write to an ISO file if you have a decompressor utility installed that is associated with ISOs. (Click the downward arrow that's far-right of the "burner" field to see the ISO option.)
Then, a double-click on the ISO will reveal the VIDEO.TS folder. Open that folder and there will be a .VOB file that can be clicked to play the production..