There is no option to click photo from video. However earlier the option was there but now its disappeared.
The default video player of Samsung Galaxy devices lets you take screen shots during watching video. To take snapshot while playing video on Galaxy S3, do as follows:
1. Open the default Video Player of your device
2. Start playing a video file
3. Tap the snapshot icon on the top center ()
4. The saved shot can be found under this path: /storage/sdcard0/Pictures/Screenshots