Master Sailing Rigger, Brion Toss introduces his 25 Basic Sailing Knots video, the rope material you can use to tie the knots, and the material you shouldn't use. Brion demonstrates the easiest way to tie each knot and situations each is used for.

25 BASIC SAILING KNOTS
Parts of a Rope
Figure 8
LOOP KNOTS:
Butterfly
Bowline & Variations
BENDS:
Ashley
Double Sheet Bend
Double Beckett Bend
SLIPKNOTS:
Slipped Beckett Bend
Cavalry Hitch
HITCHES:
Buntline
Round Turn & Two Half Hitches
Rolling Hitches (Regular, Rigger's, Camel)
Icicle Hitch & variations
Pilingspike Hitch
Carabiner Hitch
BINDING KNOTS:
Constrictor (Single & Double)
BELAYS:
Capstan Hitch
Belaying Pin Hitch
Cleat Hitch
BONUS KNOTS:
Lashings
Square Knot
Good Luck Knot