I have a script to make it an MP3, which assumes you have both youtube-dl and ffmpeg.

youtube-dl https://www.youtube.com/watch?v=nMfPqeZjc2c --output whitenoise.mp4
ffmpeg -i whitenoise.mp4 -q:a 0 -map a whitenoise.mp3

Now, you can use the MP3 file anywhere. It's 10 hours long, and should do the trick.

(Nothing particularly creative about this one, but I just thought it'd be a great computer hack.)

See also:

• How to install youtube-dl
• How to install ffmpeg