New York City blog - there is no sound in video

I am on course ‘Learn HTML’, project New York City Blog and 13 task is to create video element. I did it, but video has no sound.
I copy paste video link to Google, Edge, downloaded but there is no sound either.
Is this video should be without sound?
if no, is there way how to fix it?
Thank you.

Hello, I’m not an expert, but since the video was recorded in time-lapse, in my opinion the sound was removed when the video was post-processed because the sound recordings were unusable due to wind or something similar.

Thank you for your answer. Yes, I agree it looks like this video is and meant to be without sound.