HTML5 based streaming gives opportunity to users for watching videos without using any plugins. HTML5 supports three different formats of video. One of them is VP8, which is owned by Google and is used in this thesis. Quality of experience of videos transmitted through the network can be affected by network distortions. Packet loss is one of the main distortions in communication networks. In this project, the effect of packet loss on video, encoded/decoded by VP8, with different resolutions and bitrates, has been investigated using subjective tests.