A method of sending video data, the method comprising: providing information to a client device for accessing data for a first representation of a video sequence and a second representation of the video sequence, where the coded video samples of the first and second representations are time-aligned; providing information to the client device indicating that the client device can, during transmission of the data for the first representation, switch to the second representation without experiencing a presentation gap when displaying the video sequence and without simultaneously executing more than one decoder to decode the data for the first representation and the second representation during the switch, wherein providing the information indicating that the client device can switch to the second representation comprises sending, to the client device , a delay value for switching from the first representation to the second representation, wherein the delay value represents the sum of a decoding delay being the maximum time to decode a coded video sample and a picture reordering delay being the maximum amount of time to re-order the pictures for display for the coded video sample; in response to a first request from the client device to retrieve data from the first representation, sending the requested data from the first representation to the client device ; and in response to a second request from the client device to retrieve data from the second representation after sending the requested data from the first representation, sending the requested data from the second representation to the client device . providing information to a client device for accessing data for a first representation of a video sequence and a second representation of the video sequence, where the coded video samples of the first and second representations are time-aligned; providing information to the client device indicating that the client device can, during transmission of the data for the first representation, switch to the second representation without experiencing a presentation gap when displaying the video sequence and without simultaneously executing more than one decoder to decode the data for the first representation and the second representation during the switch, wherein providing the information indicating that the client device can switch to the second representation comprises sending, to the client device , a delay value for switching from the first representation to the second representation, wherein the delay value represents the sum of a decoding delay being the maximum time to decode a coded video sample and a picture reordering delay being the maximum amount of time to re-order the pictures for display for the coded video sample; in response to a first request from the client device to retrieve data from the first representation, sending the requested data from the first representation to the client device ; and in response to a second request from the client device to retrieve data from the second representation after sending the requested data from the first representation, sending the requested data from the second representation to the client device . <EOS>