When illustrating exercises with videos from YouTube, it's sometimes useful to use only a section of a video. YouTube allows to specify a start offset in the URL of a video.

On some devices, the Share dialog provides an option to share the video at a specific start time

The generated link will add a parameter to the URL that will start the player at the specified number of seconds after the start of the video.

All you have to do is append &t=<seconds> to a YouTube link:

You can just append this to the URL you have in the library

However, some YouTube Apps will need the parameter t as in the example above, others use the start parameter.

To make the start time work in the web browser and on mobile devices, the Trayn App will append the t parameter to a YouTube link if only the start parameter is present and vice versa.

It's also possible to specify when a video should stop with &end=<seconds>, but this is only supported in web browsers.