Jump Cutter is described as 'Skips silent parts in videos, in real time' and is an app in the Web Browsers category. There are three alternatives to Jump Cutter for a variety of platforms, including Firefox, Linux, Mac, Online / Web-based and Windows. The best alternative is Video Speed Controller, which is both free and Open Source. Other great apps like Jump Cutter are Video Summarizer (Free, Open Source) and Skip Silence (Freemium, Open Source).
A tool and browser extensions that determines whether people in a video are currently talking or not and speeds up the video accordingly. Great for skipping time spent writing on a whiteboard in long lecture videos.