O365 Video Transition To Stream question

We have not seen a comprehensive update on what an Office 365 Video to Stream migration will look like but in January 2017 Marc Mroz stated that: "We will also gaurntee that existing links and embed codes continue to function after the migration, so you don't have to go clean up any existing content references. The existing links and embed codes will just redirect and start using the new Stream solution, etc."

https://techcommunity.microsoft.com/t5/Office-365-Video/Office-365-Video-Microsoft-Stream-Convergence/m-p/39525