I think that MentorMob is great! I created one previous example with the preterite. This time, I created an example with Gustar. It goes over the grammar first and then students can submit a test. After that, I included a listening activity and asked students true/false questions about the listening. You could add another activity since there are many listening activities. MentorMob is a quick way to organize videos for students. I would definitely encourage checking it out if you have not!