Accordingly, the user is allowed to understand roughly {HEAD ~ the broadcast content} watched by {TAIL ~ the user} using the thumbnail image that a bookmark is placed on, and the broadcast content can be replayed 
watched by
Accordingly , the user is allowed to understand roughly { HEAD ~ the broadcast content } watched by { TAIL ~ the user } using the thumbnail image that a bookmark is placed on , and the broadcast content can be replayed
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH