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The live stream was on CornellCast.
I live-streamed the lecture from my desk.
The live-streamed performance made me nostalgic for the Hill.
online event, meeting, or panel
Use these terms to describe live events taking place over the Internet. Online panels typically feature a small group discussion about one particular subject. Online meetings typically include a larger number of participants. Online events encompass a variety of online happenings which don't fall into other categories, or fall into more than one category.
Reunion 2020 is an online event, as it features a number of webinars, online meetings, panel discussions, and more.
This should be lowercased (unless at the beginning of a sentence) and closed (i.e., no hyphen).
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