1. A method of processing video data, the method comprising: obtaining, from a first descriptor for a program comprising one or more elementary streams, a plurality of profile, tier, level (PTL) syntax element sets, each respective PTL syntax element set of the plurality of PTL syntax element sets comprising syntax elements specifying respective PTL information, the first descriptor being in a transport stream; obtaining, from the first descriptor or a second descriptor for the program, a plurality of operation point syntax element sets, wherein each respective operation point syntax element set of the plurality of operation point syntax element sets specifies a respective operation point of a plurality of operation points; and for each respective operation point syntax element set of the plurality of operation point syntax element sets, determining, for each respective layer of the respective operation point specified by the respective operation point syntax element set, based on a respective syntax element in the respective operation point syntax element set, which of the PTL syntax element sets specifies the PTL information assigned to the respective layer, the respective operation point having a plurality of layers.