Nope... because it easy

Ensure the following:
* You have the correct path for video files set in
options/Mame config/pictures & Videos/atttact video'set path here'
* You have videos enabled in
options/gui/options/'tick' Show Video checkbox
* You are using a Layout with a Video window. Or easily modify one with the editor to include one (instead of the snap window)
* You are using the latest codec. If it plays in Windows Media player it is ok,