Abstract: The invention relates to a telecommunication system for broadcasting multimedia content (MM) to a client device (60). Said system comprises an encoder (20) for encoding said multimedia content in an encoded data stream (EDS). Said encoded data stream is transmitted via a first network connection (30) to a server (40). Said server (40) is able to generate metadata (MT) from media data (MD) contained in the received encoded data stream (EDS) and to create a progressive file (PF), in which said media data (MD) and metadata (MT) are interleaved. Said progressive file (PF) is downloaded via a second network connection (50) to a client device (60), which is able to start playing the received multimedia content before the end of the download, using said interleaved meta and media data.