Husband buys imported milk video to talk about.

From what you described, a man named your sister brought you imported milk on Mid-Autumn Festival. There are many possibilities for the meaning of this behavior, and the specific explanation will vary according to the specific background and relationship. Here are some possible explanations:

1. Politeness and friendliness: This man may want to show respect and friendliness to your sister. Sending you imported milk may be out of politeness and goodwill, hoping to maintain a good relationship with you.

2. Express your feelings: This man may have special feelings for you, such as liking you or loving you. Sending you imported milk may be a way for him to express these feelings.

3. External meaning: Imported milk may be a special gift, representing his love and care for your sister. This man may want to convey this feeling by sending you imported milk.

But I can only guess from the information you provided, and I can't know the details. For this question, the best strategy is to communicate directly with the man and ask him why he sent you imported milk, so as to get an accurate answer.