I used this last year. Took it from the laptop and it threw it to the TV screen. No issues at all other than $2 broadcasters who know very little about the game but speak like they do...
I watched the NFHS broadcast of some hoops semis and the Sinclair/My40 broadcast of the Murphy football final last year. Sinclair is much better quality and announcers, and cheaper. They usually stream their broadcasts on Facebook too.