Mashyt
Do you remember the Millenial need to post extremely poignant song lyrics on whatever platform you had been cornered into? Mashyt is a tool to mash Youtube clips together to create a stream of music to express your innermost angst, love, or sorrow.
You could also use it to make study materials, a playlist of only the good bits of songs, or a compilation of very time Alex Horne looks at the camera in Taskmaster.