radio, television
cable, satellite
digital, Web
live
outside
election, news, party political (BrE), religious
digital
network (esp. AmE)
There is pressure to cancel the network broadcast of the movie.

make
The president made a radio broadcast to mark the end of the war.

hear, see, watch
receive

in a/the broadcast
More details will be given in our news broadcast.

broadcast by
a broadcast by the president

broadcast on
a radio broadcast on the problems of unemployment

live
nationally
originally
This interview was originally broadcast last Friday.

from
We will broadcast live from the ship.

to
a Christmas message broadcast to the nation

Broadcast is used with these nouns as the subject:
channel, loudspeaker, station, television

Broadcast is used with these nouns as the object:
commercial, documentary, episode, interview, message, music, news, programme, propaganda, series, speech, video