Download maps

I recently started playing halo 4 on the xbox360 I then I tried to recover the maps I had so I went to you tube clicked on. Link and brought me to this new weird looking halo waypoint I have been searching fir about 20 minutes and. Can seem to find where I can download maps I remember in halo reach maps were very easy to download

You tried to recover maps that you’ve downloaded previously on YouTube? Or what?