@Emberguard
Great!
I now feel ready to become a fully-informed & fully equipped archeologist!
Through further examination, I have two new discoveries:
First, the "tiles" are 3D, cubic shape, and not 2D rectangular;
(which answers the question "what is the darker-brown strip in the lower part of the lighter-brown rectangle?)
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Second, what exactly are in a jug (or vase, or flask, or pot, whateves...)?
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Well, this is not shown anywhere in the anouncement but can only be seen from a freezed frame in the youtube video:
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