It appears that they are thinking about each other at the same time. However, that’s not completely true. If you pay attention to the video, there is a close up and medium shot to show her putting the note in his jacket pocket. The shot directly after that is a medium shot of him taking the jacket out of his car and putting in on. The is no way those things were happening at the same time. I believe that the shots of her writing the letter and putting the letter in his jacket are flashbacks to explain the following shots. Though some of the shots are a use of parallel editing, not all of them are, they vary.
Some shots of the video were similar to surrealism, meaning that they were dreamlike. An example of this would be the shots were there is snow inside of the room. This shows that she is daydreaming in a way and remembering their time together. In a way the snow could be representing her memories coming back to her at once.
The editing of this video flows with the cinematography or the way the video was photographed. There are not many sound effects in this one but, the one that you do notice is the sound of the guys boots against the snow, as he is walking through the field in the beginning of the