The new Grappy has a bit complicated for recording VHS videos, because audio capturing can hangs. One way to solve this problem is to install Simplescreenrecordin desktop-recoder and record the video from the screen.
sudo add-apt-repository ppa:maarten-baert/simplescreenrecorder
sudo apt-get update
sudo apt-get install simplescreenrecorder
# if you want to record 32-bit OpenGL applications on a 64-bit system:
sudo apt-get install simplescreenrecorder-lib:i386
For watching the video from the screen, you can use mplayer command
mplayer tv:// -tv driver=v4l2:width=720:height=576:outfmt=uyvy:device=/dev/video0:\
immediatemode=0 -ao sdl,alsa
You can make a laucher from that command also.
For knowing your video and audio hardware run commands
Because WordPress shows the commands wrong read commands here
An another way with RCA to AUX audio adapter