Knowledgable pit-umm... guys...(and gals)

I need some software where I can move a slider along a bar and then split an mpeg at that point. Possibly a second slider for 3 part clips. I need freeware/open source software, Google is just giving my share/malware.
Please help me Pit!
I'm so unique I don't even have a sig.
As much as I want to follow Fronkpies' advice...

You mean like in video editing software where you can split the clip at the playhead?
Thus sayeth the Lord.