so i did a bit of search & found out this feature is already present in one of my favourite free player all along.download & install 32bit(64bit version players have no practical advantages & many more issues) from here:
DVB Support Download Center » Tools » Players » Daum PotPlayer 1.5.35491
right click inside player window & from menu select playback---skip---enable skip feature.then below enable skip feature select skip setup & in the next window add the time of starting & duration of section to be skipped.you can add multiple skip sections.also remember to first check your settings by playing video(don't want to experience an awkward movement with family now).do note that these settings are permanent & will apply to all videos so for each video you have to edit these settings & if you want to watch some video fully then you have to disable the skip feature.
P.S.piracy is wrong even if it means no physical stealing.think how you would feel if you spent months writing a 5000 line code & someone instead of paying you money to use that 5000 line code software simply use a 50 line code crack to use your software for free.if you can pay then buy software else use free ones.