Read the following information on how to use the script.
Select the video from the menu or use the options window to select the preferred video definition and container.
Click this button to get the video stream link. If the download doesn't start, click "Link". The browser will show the open popup window. Some browsers don't have this feature and will open/play the video, for these right click 'Link' and 'Save link as'.
Some sites use DASH streams, which are audio only and video only. These are shown in the videos menu as "Video Only" and "Audio Only". Download both streams and use an external tool to multiplex them. This can be made automatic, enable DASH download support in the options window and the videos menu will show new videos as "Video With Audio". You can download these using a browser protocol and an external script, read below for more details.
Click the vertical dots to open the options window.
(SD, HD etc.)
Select the default (highest) video definition.
(MP4, WebM etc.)
Select the default video container.
Enable/disable video auto-download. If it's on the video download will start when the video page is loaded or when a new video format is selected. This works for "High Definition MP4" YouTube videos only.
Enable/disable DASH streams (video with audio) download. It requires an external application for muxing the audio and video streams