Answer:
learns of it after the contract is formed.
Step-by-step explanation:
In order for a contract to be enforced, both parties involved must be willingly enter the agreement after knowing each terms of the contract. Each parties can make the acknowledgement through signature, recorded verbal agreement, or digital check-marks.
In the case above, the contract is only known by one party (the video maker), and the buyer (ember) was not aware of its existence.
If Ember can bring a proof that she doesn't know about the shrink wrap agreement before buying it, the court can determine that she will not be held liable for the content of the agreement.