Just went through the process. I'm glad that you can take a few cracks at the video before you choose to upload it. Overall, people's opinions will be colored by how employers use the process.
If a company wants a bunch of work done for free then maybe it's a signal to move on. If the company uses the tool to respect the time of the applicants and make hiring more efficient, it's good for everyone. Perhaps HireArt can guide employers here on the best way to use the tool.