This call is used to retrieve a collection of previous broadcasts for a specific channel.
sort: defines how to sort the collection. 'popular', 'random'
Example 4. http://live.yahooapis.com/v1/channel/freakshow/broadcasts
<broadcasts yahoo:total="18" yahoo:start="1" yahoo:count="10">
<broadcast yahoo:uri="http://live.yahooapis.com/v1/broadcast/FhS15kkcSf47FsrZqU369c0-"
yahoo:created="1969-12-31T16:00:00-08:00Z"
yahoo:updated="1969-12-31T16:00:00-08:00Z"
start_time="2008-01-09 16:39:48"
stop_time="2008-01-09 16:40:17"
peak_viewers="15"
total_viewers="30">
<channel id="freakshow"
yahoo:uri="http://live.yahooapis.com/v1/channel/freakshow"/>
<user id="freakshow"
yahoo:uri="http://live.yahooapis.com/v1/user/freakshow"/>
<image id="ycnCjs0cSf4DleGSAA--"
url="http://live.yahoo.com/imx/broadcast/FhS15kkcSf47FsrZqU369c0-"/>
</broadcast>
.
.
.
</broadcasts>