Compared with traditional listening class, students will be more engaged in the class if they watch videos. Sometimes videos can help them understand the content better because they can guess the meaning based on facial expressions and body gestures. However, sometimes students can also get distracted if they receive so much information at the same time. They can always find out some extra information which is not supposed to be focused on and start discussing about that.
These tools help guide students to follow the right track and will tell them which part of the video they need to pay special attention to. Their critical thinking will also be developed if some open questions are asked along with the videos.