Often comfortable viewing of recorded lectures or other learning materials is hindered by the speaker’s slow speech and long pauses between sentences, so that you constantly have to rewind unnecessary fragments or listen to silence.
To fix this, use Skip Silence. It’s an extension for Chrome, Firefox, and Edge that automatically skips silence in video and audio files on any web page.
The tool also has settings for recording acceleration and silence rate. The extension works on most streaming media services, including YouTube and popular social networks. The source code of the project is available on GitHub.