Legal use of assets

I am posting this as an answer because I am not allowed yet to post comments, but also because it is not very short and may not be good as a comment.

The default license: https://unity3d.com/legal/as_terms

Says:

EXCEPT FOR EDITOR EXTENSION ASSETS, END-USER is granted a license to install and use Assets on an unlimited number of computers provided that these computers are either all (i) physically located at a single physical location ("Site") belonging to END-USER, or (ii) laptops belonging to END-USER which have been made available by END-USER to its employees that are employed at the same Site provided all such computers have appropriately licensed Unity software installed. Consequently, any Asset may only be used at particular Site or on computers assigned to END-USER's employees employed at the same Site and may only be moved to another Site subject to prior written approval from Licensor. THIS CLAUSE 2.3 DOES NOT APPLY TO ASSETS THAT IN THE UNITY ASSET STORE ARE CATEGORIZED UNDER THE HEADING "EDITOR EXTENSIONS."

However, it also says:

Licensor grants to the END-USER a non-exclusive, worldwide, and perpetual license to the Asset to integrate Assets only as incorporated and embedded components of electronic games and interactive media and distribute such electronic game and interactive media.

Now, here is the deal. Unlike other licenses out there, it doesn't specify what it means by "electronic games" and "interactive media" and under what form one is allowed to share them.

Sure, I must be allowed to share binaries, but what about the source code (AKA, the Unity project)?

In my case, I was given a project to make by someone else.

When I am done, I will have to give them both the binaries and the Unity project.

Do both of us have to buy a license of the same assets?