It's not that difficult to describe. The media is described based on its content, format, and time of release.
If the core content is text-based, it's a blog. If it's audio-based, it's a podcast. If it's video-based, it's a either a vlog (for personal content) or simply video (for topical content). These all assume the content was first created, and then released.
If it's released at the time it's produced, it's a livestream, or just a stream.