A method of processing an omnidirectional video by a client device, said omnidirectional video being associated with a 3D coordinate system for determining a spatial position of video data of said omnidirectional video on a curved surface, said method comprising: receiving a manifest file, the manifest file comprising a plurality of tile stream identifiers for identifying a plurality of tile streams, the tile streams comprising video frames with 2D projected video data, the video frames having image views, whereby the image views of video frames of different tile streams cover different regions of a 2D projection of the omnidirectional video, a region defining a tile; selecting on the basis of spatial relation information in the manifest file and on the basis of a viewpoint of a user of the client device a first tile stream associated with a first resolution and a first tile position and a second tile stream associated with a second resolution and a second tile position, the second resolution being lower than the first resolution, wherein the spatial relation information defines for each tile a tile position and wherein the viewpoint defines a viewing direction of the user, the tile position and the viewpoint being defined on the basis of coordinates of the 3D coordinate system; requesting the selected tile streams from one or more tile stream storage devices; and, receiving the 2D projected video data of the selected tile streams and receiving mapping information, the mapping information providing the client device with information for enabling the client device to map the 2D projected video data of the tile streams as omnidirectional video data onto the curved surface; processing the 2D projected video data of said received tile streams on the basis of the spatial relation information and the mapping information. receiving a manifest file, the manifest file comprising a plurality of tile stream identifiers for identifying a plurality of tile streams, the tile streams comprising video frames with 2D projected video data, the video frames having image views, whereby the image views of video frames of different tile streams cover different regions of a 2D projection of the omnidirectional video, a region defining a tile; selecting on the basis of spatial relation information in the manifest file and on the basis of a viewpoint of a user of the client device a first tile stream associated with a first resolution and a first tile position and a second tile stream associated with a second resolution and a second tile position, the second resolution being lower than the first resolution, wherein the spatial relation information defines for each tile a tile position and wherein the viewpoint defines a viewing direction of the user, the tile position and the viewpoint being defined on the basis of coordinates of the 3D coordinate system; requesting the selected tile streams from one or more tile stream storage devices; and, receiving the 2D projected video data of the selected tile streams and receiving mapping information, the mapping information providing the client device with information for enabling the client device to map the 2D projected video data of the tile streams as omnidirectional video data onto the curved surface; processing the 2D projected video data of said received tile streams on the basis of the spatial relation information and the mapping information. <EOS>