A girl sends you a wedding video. Let's see whose wedding video this video is. But this is his friend's, and he also attended the wedding, so sending this video may be to share the atmosphere of the wedding with you. If I send you this video for no reason, there must be a reason!
Since you two are lovers, he sent you this video, which may imply that you will do the same after you get married. At the same time, this video should be his favorite wedding, which also shows that she is yearning for this kind of marriage!