Learn chess openings by playing them, not watching them.
Annotated opening courses you play on the board. Drill your moves from memory, and each line comes back for review when you're about to forget it.
How a lesson works
1. Learn
Step through a line move by move, with a short note on why each move is played.
2. Drill
Play your side from memory. The opponent answers; wrong moves and hints are counted.
3. Review
Each line comes back when it's due: soon after a mistake, weeks later once it sticks.
Courses
Caro-Kann Defense
For Black against 1.e4
Solid and reliable: the Advance, Exchange, Panov, Classical and Two Knights, plus the common sidelines.
Jobava London System
For White with 1.d4
An aggressive London with Nc3 and Bf4: Nb5 tricks, the f3–g4 plan, and an h-pawn attack against ...g6.
Slav Defense
For Black against 1.d4
The Caro-Kann's twin: ...c6 and ...Bf5 against the main lines, the slow e3 systems, and the London and Colle.
Italian Game
For White against 1...e5
The modern, slow Giuoco Pianissimo, the Two Knights with 4.d3, quieter replies and the traps to avoid.