Apex API to Start Replay

You can use the example code below to create a Replay session using Apex API's from a Case object record. You can call this in a Flow for any event

//create the newSessionParams
screenmeet.ScreenMeetAPI.ScreenMeetSessionParams newSessionParams = new screenmeet.ScreenMeetAPI.ScreenMeetSessionParams(
    'replay', //session type
    '5001R00000xgLmIQAU', //parentObjectId 
    'case', //owner object type
    UserInfo.getUserId(), //Logged in user ID
    'My Support Session', //session description
    UserInfo.getName() //name of currently logged in USER
);

//make the REST API call to create the session
screenmeet.ScreenMeetApi.createSession(newSessionParams);

For a full list of available ScreenMeet Apex API's, visit the Apex API Reference page.