Question

dynamics - the volume of music
decrescendo
gradually get ...
insert a video here with a song that has this dynamic marking. use the time stamps to highlight the spot with a decrescendo!
crescendo
gradually get ...
insert a video here with a song that has this dynamic marking. use the time stamps to highlight the spot with a crescendo!

Explanation:

Crescendo and decrescendo are core dynamic terms in music. Crescendo refers to a gradual increase in volume, while decrescendo (also called diminuendo) refers to a gradual decrease in volume.

Answer:

• Crescendo: Gradually get louder
• Decrescendo: Gradually get quieter

For the video insertion task (example):

• Crescendo example: A clip from Beethoven's Symphony No. 5 (opening transition, ~0:15-0:30) where the volume swells.
• Decrescendo example: A clip from Debussy's Clair de Lune (~2:30-3:00) where the volume fades softly.