To Begin With The iPhone 3GS Was Released June 2009, It Came With A Few New Features Like Video Recording And Video Editing, Well I’m Going To Show You How To Get the Editing Feature On Stock And Jailbroken 3.1.2 FirmWare
What You Are Going To Need Is
iFile, Cycorder & Your iPhone 3G on 3.1.2 FW This Will Not Work On iPhone 2G
Method 1
Step 1: Record A Video Using Cycorder.
Step 2:Once Your Done Recording Your Video Using Cycorder Open Up iFile
Step 3: Go To: “/Var/Mobile/Media/Videos/” Select Your Video Edit Copy.
Step 4:Paste Your Video To “/Var/Mobile/Media/Dcim/100APPLE
Step 4:Once Your Video Is Copy To Photos You Will Need To Rename Your Video To “IMG_0001.3gp(Look For The Last Numer Of Pictures That Have IMG_0001 EXP: IMG_0021.png You Would Want To Name The Video IMG_0022.3gp)
Step 5: Go To Photo App Then Look For Your Video And Play it, There Will Be A Silver Bar At The Top Of Your Video Put Your Fingers At Both Ends Then Edit Your Video.
Method 2
Step 1 Record A Video On Any Phone Phone
Step 2: Send The Video To Your iPhone 3G Make Sure Its On Fw 3.1.2
Step 3:Save The Video
Step 4: Go to Photos App And Edit The Video