The London System is considered easy to learn and a solid and safe setup for White against most of Black’s opening variations, which is why it is especially popular with club players. Some, however, also characterize it as boring and draw-prone opening.
Eric Rosen often plays the London system in his streams. So he also has several videos about this opening. One of these videos is a lecture on the Saint Louis Chess Club YouTube channel: Beat Good Players with the London
If you want to learn more about the theory of the London opening, I can recommend this video series by Hanging Pawns. In the videos he goes into the theory of the opening and explains how to respond to different responses from black.
One of the oldest documented games using the London system is a game between James Mason (White) and Joseph Henry Blackburne (Black) played at a tournament in London in 1883.
Studies about the London System
Learn the London System using public studies.
London System Repertoire503 by SummerAndo
Repertoire for white in the London System.
Londom System11 by Randy2206
Este es el sistema londres y las diversas variantes que pueden suscitarse dentro de este patrón de juego, es eficaz a la hora de jugar con blancas y es capaz de dejar las piezas del rival en estado de inmovilidad permitiendonos atacar efectivamente el flanco de rey
London Traps Training10 by Ilitsj
Win material, get a winning position or mate the oppononent with these London tricks. All these studies are public information and are gathered from Youtube, Lichess and other sites.
London System Intro Variation8 by Painterpainter
London System Intro Variation
Jobava London System6 by Gilbert
A comprehensive look at the off-beat and now trending Jobava variation of the London system.
Defense against london by gothamchess and agadmator5 by tiranor
Taken from lichess, with games examples https://lichess.org/study/l1AFcRv5
Play against Stockfish
Do you want to try out the London System? Train this opening against Stockfish.
Play against Stockfish either as white or black and explore the opening.