Videomaker – Learn video production and editing, camera reviews › Forums › Technique › Editing › Sony Vegas black screen › If all your clips are black,
If all your clips are black, as you indicate, you really don’t have any “edited clips” yet. You might try running a couple of the source clips through Handbrake, which you can download free and see if converting them to MP4 works.
You can also convert files in VLC, the free video viewer. Look at the article at https://en.softonic.com/articles/vlc-media-player-as-video-converter for more information about this.