[embed] is a more generic version of [video] that uses one of a few standardized formats for fetching information from another service (like YouTube) and displaying it. The differences in behavior stem mostly from the particular service and how it chooses to display the requested content when we access it one way instead of another. In short, feel free to use [embed] or [video], as you prefer. Depending on the video service, there may be slight differences in the controls.