You just joined for a week and you already have an opinion that 'users are not valuable for Rumble'. I have the experience that users (videos) are valuable to Rumble. First ask yourself the question why Rumble should buy your videos. Are they funny, show something special or interesting etc.
What is the link to the video. Also if you email support they may be able to tell you why it was rejected. They will have a very good reason as to why. Videos are not generally rejected unless their is a good reason such as copyright infringement.