This site has tons of helpful video tutorials to teach you how to knit.
A stunning double knit floral cowl - it's a free pattern!
double knit cast on. This could be a neat way of casting on without seeing the cast on stitches.
A double knitted baby blanket for counting stars: Octave or Octavie by imawale imawale [Una copertina da neonato lavorata con la tecnica del double knitting per contare le stelle: Octave or Octavie di imawale imawale]