I delete some personal videos and pictures how can see again help me

You can try data recovery tool to find them back.
Have a look at this guide,

Recover Deleted Photos Pictures from Android Phone

Data recovery software- Directly recover deleted files from Android phone and tablet. GT Recovery for Windows is a professional data recovery for Android phone or tablet. It can restore deleted photos,videos,audios,documents from Android SD card and internal memory. Whenever you lost important pictures or deleted photos by accident, you can use it to scan and recover the images on your Android devices.
Here are the steps to recover deleted data on Samsung Galaxy S4.
With this way you can recover deleted data on any brands of Android device such as Samsung, HTC, Huawei, Sony, Motorola, Lenovo, LG, Sharp, etc.
Google+:https://plus.google.com/communities/109657948177651590858
Facebook homepage:https://www.facebook.com/GT-Recovery-for-Windows-527139864132104/

Don't try to safe anything don't shoot another still or video, till you recovered the deleted videos and pictures.
Not knowing what device the video and pictures are on, I don't know what you could use, but on most computers (windows and MAC) you can run recover program's to "undelete" files.
try google to see if there is any recovery program for the device you have. Most memory card firms have programs for their memory cards. There are programs on the net that offer free recovery, but after running them, they only recover one or a few files. The rest they will "recover" if you pay. Just look for another program, because I'm convinced there are free programs around.