This program can mass create multiple promotional movies at once using only these elements:

Pre-recorded .mp4 video clips. Title card .png image file. Ending card .png image file. Sound effect 1 that plays during the Title card. Sound effect 2 that plays during the Ending card.

It will join the video clips in a alphabetical order, apply a Fade from Black transitions to all them individually, place a Title Card + sound effect after the first clip and an Ending Card with stylish Fade from White effect, also with its own sound effect. The result is a fully edited trailer that you can directly upload to youtube, showing off pure gameplay footage, attracting attention with an exciting message slide after the first clip and finishing the movie off with an ending slide with a clear call-to-action. Record your clips with ShareX, prepare images/sounds, 2 of each, and run this program to put em all together! Heres a sample of a result: https://www.youtube.com/watch?v=EQJvUm3dL3w