Finamore et al. discovered that 60% of YouTube videos are watched for less than 20% of their duration [8]. For this reason, the all-at-once strategy used by Lumia is not always energy efficient. We plot in Figure 5 the average current also in the case for Lumia where watching is interrupted after 20% of the total duration. We notice that the proxy saves energy in this case, which is obvious since the all-at-once strategy downloads a lot of unnecessary content. Finally, the energy consumption overall differs quite a lot between the devices, which is mostly explained by the different hardware components used in the phones.