Pay attention to the quiet ones, they might begin to feel lonely and as much as some people hate video chat, especially when it's not something you're used to, it really does help with the isolation.
It depends what kind of business you're in, however assuming something like software development, embrace tools like JIRA even more to track work and make sure people have things to do, and also aren't getting stuck on something without asking for help.
For people that don't normally remote work, picking up the phone or having a video chat can feel too intrusive or embarrassing - It's a stigma that needs to be removed.