Unlock S6 which i forget password after reboot but keep my image & video

Hi, is there a way to unlock my phone as it had no battery once and when it on, i asked for a password and i literally forgot what it is.. usually i use fingerprint for phone lock and unlock but i never off my phone before.. few days ago i forgot to charge and the battery went flat.. when i on the phone it asked for a password which i forget....

I know that there is a way to reset the phone but there is also some important image and videos which i need to keep.. when i plug in to pc it can recognize it but it would not show the things inside the phone as i need to unlock my phone to do it 1st :/

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