How to Join knitting machine Panels and Tubes seamlessly

I recently made a few videos explaining the 3 basic stitches to join circular knitting machines Panels and Tubes.
Each one of this stitches is used for a specific reason and they all look seamless after the piece is ready. If you are making either a Blanket or a sweater or a scarf you will eventually need to Graft or Mattress stitch the knitted pieces together when you want to make wider pieces then the ones the circular machines can make.