This video discusses the history and development of the electric guitar. It explains that the electric guitar was invented in the 1930s to amplify the guitar for ensemble groups and big bands. In the 1950s, electric guitars became popular in rock and roll music which emphasized a heavier sound that was well-suited to the amplified electric guitar. The electric guitar transformed popular music and became a iconic instrument for rock, blues, and many other genres.

1. https://www.youtube.com/watch?v=qQWDosEo2lc&feature=iv&src_vid=rXWcC4JyBHU&anno
tation_id=annotation_3515435683
https://www.youtube.com/watch?v=I_gNZwA8bjM