Hello I am trying to create a custom function that I can initiate through a Zoho Flow I am thinking.... Trying to figure this out. 

I want to be able to trigger this and either add a custom message (that contain GIFS ?) or possibly even play a custom made/uploaded video for our user(s) for different performance Goals and Announcements. I am thinking this could be triggered by crm user(s) next sign on? But then again... how would the system know to only show this one time and not over and over again for each time the same user logs in.

Any ideas on how this would be best implemented / code to get started with this? I know I can just send user(s) a Cliq message, but that is boring to me !