Finding the right term for a search is tricky, but I found what looks like a good listing in Google with this search term;
How to create Newscast type videos
See if that helps for you.
I won't add any links since I don't know how much money you have to spend, but in my listing the very first hit was for Adobe's "Visual Creator 3", which seems useful.
Hope that helps.
I'm looking for software that would display videos and feeds similar to that of a news cast, where you have some main video feed, maybe another feed next to it, and a something like a news feed at the bottom of the screen.
It would be great is the system is customizable as well, being able to place things wherever you want them.
Thanks in advance