Looking specifically at mobile-based activities, Morning Consult found in a poll conducted April 10–12, 2020, that 34% of US adults were spending more time on social media on their phone. Females were more likely than males to be spending increased time (40% vs. 28%), and younger adults were more likely to do so than older ones.
This includes scheduling the livestream 10 days in advance on YouTube and getting as many people as possible to set reminders for native triggers like mobile and desktop push notifications.