Good to know:
Use the same method to watch any prior Mass in YouTube. They just won’t be labelled “LIVE”.
Before you start:
Click to open the Spiritual Communion Prayer in a separate tab.
The priest may ask you to pray this before Communion.
Click a Mass event (labeled *LS) to display the details:
Typical details:
Click the link to open the YouTube page:
YouTube pages may differ, but you should see a LIVE NOW event (circled, below). Click on the image to open the video.
If you don’t see the LIVE NOW event, it may not have started yet (wait awhile or come back later). 
YouTube Mass:
Catholic Parish of the Holy Name