i have learned that when exporting, if you overwrite the previous version of the file while exporting all you will get is a black screen with audio when opening your video in another player…Shotcut would not open a file overwritten in this manner…when exporting in this manner, i’ll keep the same title…but i’ll add an 01, 02, 03, ect. in the title then ditch the previous versions if i need to…hope this helps