The video keyword manager is a new dialog that give you a number of functions that will save you time. We added this functionality in Fast Video Cataloger 5. If you have not updated to the 5.x version you can always get the latest version from https://videocataloger.com/download/. It is worth giving it a test as it can save you quite a lot of time when working with your videos. Here is a short video presenting the new video keyword manager.
If you have not already doing it… I highly recommend starting to use color for your keywords. Colors makes it much quicker to find the keyword you are looking for when you have a large video collection with lots of keywords.