I've created these "buscapalabras" activities for each chapter that I teach in the level 1 book of Realidades. You play the video (with vocabulary), students have to watch the video and every vocab word that they SEE (not that they HEAR) they have to put a check or X in the line. After the video is over, I say "dime sí si la viste o no si no la viste". Next, I tell them rapid fire...tell me what they mean in English. We talk about the video, they do other activities with it, etc. The chapters included are: 3A, 3B, 4A, 4B, 5A, 5B, 7A, 8A, and 8B.
This activity follows the theory: 90% of what students see, hear and do they will retain. I do this activity of day 2 of my unit and after students acquire 80% of the vocab words!