Get the DVD Ripper from Aneesoft official page.
Windows Version: http://www.aneesoft.com/win-dvd-ripper.html
Mac Version: http://www.aneesoft.com/mac-dvd-ripper.html

This Video would tell you how to rip and convert DVD to HTC One S video with the help of Aneesoft DVD Ripper Pro.
The HTC One S only supported limited videos:
Video supported formats Playback: .3gp, .3g2, .mp4, .wmv (Windows Media Video 9), .avi (MP4 ASP and MP3)