Answered
How to extend the timeline in after effects in the beginning of video?
I want to extend video but before the start.

I want to extend video but before the start.

Ctrl + K to change your composition settings, change the duration a little higher (depending on how much footage you have before the comp starts) then just Ctrl + A to select all and move it to the end of the comp.
Already have an account? Login
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.