The duration of the live stream is relative, and it is dependent on several factors. Technically, there is no defined answer to this. Instead, it depends on factors such as the number of viewers, engagements, type of live stream platform you are using, your musical style, etc. Nonetheless, knowing the best timeframe for your rap concert is a learning experience. Generally, if you notice people leaving your virtual concert, you should consider putting such a session to an end.