If you go to the Youtube video directly you can click in the description to jump to these points:
0-1:30 Overview of importing LRHSD schedule and bell schedules
1:31 Overview of Google Classroom integration with Google Calendar
2:35 Adding LRHSD Day Schedule (iCal, copy URL, add URL)
3:16 Exporting a Calendar
4:02 Import the bell schedule (settings, import calendar, choose file, ClassScheduleTemplate.ics, select calendar, import)
4:57 Planning with the calendar events
Here is the Bell Schedule Template that can be imported to your Google Calendar: Click here to download.