Its very simple step , no need to install any app

1. go to album
2. press and select one picture/video
3. once you select picture you will see top right corner option
4. open it and you will see select all

Select all images including videos and delete it :) i hope you get this

Thanks cgkite.com

It's very simple step and there is no need to install any app.

1. Go to album
2. Press and select one picture/video
3. Once you select a picture you will see top right corner option
4. Open it and you will see select all

Select all images including videos and delete it.