I figured it out. Each emulator, be it MAME, DAPHNE or others later added, have the path I noted earlier for the Video Themes and Video Backgrounds.
What you will need to do is point the Video Background path to the video with the arcade machines:
- Find the video bak.mp4 located under \GameEx Arcade Edition\Themes\Draconus\MEDIA\
- Since MAME requires a video of the same name as the system, copy bak.mp4 and paste it to D:\MAME0217\Video Background and rename it to MAME.mp4
This should fix the issue.
Please let us know if this resolves the issue. Thanks!