Hi Sriram,
I hope that one of our community users might reply to you soon with an example from their catalog.
In the meantime: As you likely know, AtoM was built around the ICA standards (and later, other archival description standards were added as well). I would suggest you look to those standards for general guidance.
For example, while I did not find one specifically for a CD, there are many full description examples at the end of the ICA'S ISAD(G) standard, including sample descriptions of videos and other media. You can find a copy of ISAD(G) in many languages here:
Good luck!