{HEAD ~ The random access memory} provides {TAIL ~ realtime access} for recording and playing back video from and to a video source 
provides
{ HEAD ~ The random access memory } provides { TAIL ~ realtime access } for recording and playing back video from and to a video source
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH