A colleague introduced me to Movie Segments for Warm-Ups and Follow-Ups. It looks like a useful site that includes discussion questions to use before and after introducing a topic. The following is from the blog introduction:
This blog contains a series of movie segments to be used to brainstorm, warm up, follow up, and activate schemata, preparing the students for the topic that will be discussed in class. Here you will find the segments, the lesson plans, and varied topics to foster conversation. You may use the activities for a full two-hour class or they can be used separately to brainstorm or wrap up the topic, focusing on conversation, vocabulary and listening comprehension.