1. A non-transitory computer-readable medium for storing data associated with a video, comprising: a data stream stored in the non-transitory computer-readable medium, the data stream including packets having encoded information related to the video, the packets including packets of a first packet type and a second packet type out of a plurality of packet types, wherein each packet of the first packet type comprises an operation point identifier identifying an operation point associated with the respective packet, out of a plurality of operation points associated with a plurality of scalability types, the operation points having a sequential operation point order, and each operation point identifier comprising a fixed-bit-length syntax element, wherein each packet of the first packet type further-comprises data, which when parsed by a decoder, contribute to reconstruction of at least a portion of the video at the corresponding operation point associated with the respective packet, wherein each packet of the second packet type comprises a scalability descriptor including information defining a total number n of the plurality of scalability types and a semantic meaning of the plurality of scalability types, and information, which when parsed by the decoder, indicates an association of n portions of the fixed-bit-length syntax element with the n scalability types, the n th portion being a measure of a position of the respective operation point within the n th scalability type.