If the announces are sent in IPv4 :
% vlc -vvv --extraintf sap
If the announces are sent in IPv6 :
% vlc -vvv --extraintf sap --sap-ipv6
Then open the playlist: you should see the names of the programs announced in SAP. When you double-click on the name of a program, VLC will subscribe to the multicast address and start to play the stream !