Why do videos have to buffer when you rewind on media players(eg YouTube)

Question

If I watch to 1:20 in then click back to 1:00 the video will load, but if I’ve already watched that part wouldn’t it be “stored” on my side of the browser?

In: Technology

Answer 1

Nope. In the olden days it did but with modern browsers you only cache a small part of the video. You aren’t downloading the whole thing.