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.
http://www.maartenbaert.be/simplescreenrecorder/
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:\
input=0:fps=25:alsa:amode=1:forcechan=2:audiorate=48000:adevice=plughw.2,0:forceaudio:\
immediatemode=0 -ao sdl,alsa
You can make a launcher from that command also.
For knowing your video and audio hardware run commands
ls /dev/video*
aplay -l
arecord -l
Because WordPress shows the commands wrong read commands here
An another way with RCA to AUX audio adapter