MS Access: Code to trim first few and last few seconds of home videos

My Dad passed recently and I have a ton of videos he took of our family vacations to Florida mostly, but he also took video of local trips to see the Tall Ships, tailgating for The World Cup, family birthday parties for my nephews/nieces, graduations, etc.. Most of them begin and end with footage of him turning his camcorder on and then off with the camera pointed to the ground.  I'd like to create a Microsoft Access database that trims the first few seconds and the last few seconds from all videos contained in a certain folder on my hard drive.  All videos are now in MP4 format and the folder path will be populated in a textbox named txtFloridaTrips.  Can anyone assist in providing some code?  

So far I've been doing these edits manually in the Microsoft Photos app and after two weeks I'm only through 10 percent of the videos so I'd really like to expedite the process.