Typically all the files that are supported by iconik are not supported for viewing in web browsers used to access iconik. Even if they are they can be of high-bitrate and take time to download, view so iconik automatically create proxies that can be viewed and of a quality that is good enough to preview the content of the asset.
For supported video formats iconik create a proxy in an MP4 wrapper using the h.264 codec. This can also have two audio channels (as supported by the majority of web browsers). This video proxy is used by the Video Player.
Audio proxies are created from supported Audio-only formats for playback in the web.
Image proxies are generally large keyframes of the original image.
When requesting a proxy a secure signed link is created for viewing the proxy, this link times out after a short time and makes it unsuitable for sharing.