For TemporalUrls you must enable mwEmbed

With a template edit

Its best to use the template ( so that once we update all the embeds once "Timed Media Handler" extension is deployed )

Starts at 10 seconds and stops at 20 seconds
Starts at 1:10 seconds and stops at 1:30 seconds

Raw edit

Starts at 10 seconds and stops at 20 seconds