YTIntervals

A tool to quickly mark and save segments of a YouTube video as a json file.

A segment is a contiguous time interval. YTIntervals allows you to group several segments into segment-groups. A segment-group is simply a set of non-overlapping segments.

Example

In video https://www.youtube.com/watch?v=IcDI1iWmIp8 (note all times are in seconds):

• Segment-group "smile" may be associated with segments 33.2-41.2s and 51.3-53.5s.
• Segment-group "frown" may be associated with segments 30.0-35.0s, 70.0-71.9s and 82.1-84.7s.

Using YTIntervals, you can name these segment-groups, mark the segments in each segment-group and save the results into a intervals.json file in your downloads folder. In this example, the file will contain the following:

{"url": "https://www.youtube.com/watch?v=IcDI1iWmIp8",
 "smile":
	[{"startTime":33.2,"endTime":41.2,"active":false},
	 {"startTime":51.3,"endTime":53.5,"active":false}],
 "frown":
	[{"startTime":30.0,"endTime":35.0,"active":false},
	 {"startTime":70.0,"endTime":71.9,"active":false},
	 {"startTime":82.1,"endTime":84.7,"active":false}]}

Installation

• Clone this repository to your local computer.
• As described in the next three sub-steps, enable developer mode in Chrome, then load the repository as an unpacked extension:
  • Go to chrome://extensions
  • Toggle the button on the top right-hand corner to enable developer mode.
  • Click on "Load Unpacked" (top middle of the page) and select the directory you cloned the repo into. You should get an extension button with a "scraper" icon () at the top right hand that says "YTIntervals" when you hover over it.

Use

1. Go to any YouTube video and pause it. The tool works whether the video is paused or running. However, it is usually much easier to precisely label a paused video by moving the slider around.
2. For each new named segment-group you want to add, click the extension button . Enter the name of the new segment-group at the prompt.
   • Now mark the segments corresponding to the segment-group. For each segment:
     • Move the slider to where you want your segment to start. Press Shift
     • Move the slider to the end of the segment. Press Shift again.
     • YTIntervals will show you the segment you just marked using a white rectangle along the slider.
   • If you need to delete a segment, just click on its rectangle.
3. When you are done labeling, use Ctrl-Shift-s to save an intervals.json file to your Downloads folder.