Please provide a unique Track.Id for Emy storage to uniquely identify it. If a track with the same ID is already stored in Emy, it will be overwritten.
If you want to insert audio only from a URL which contains both audio and video streams (i.e. .mp4, .mov, etc.), please set TrackInfo.MediaType to Audio (value = Audio). Same for Video (value = Video).
By default, a wide variety of media formats are supported, listing them all here is not feasible. If you encounter an unsupported format please contact support.