Not necessarily, I can help you by writing the script as long as you have a clear idea of what you want to communicate in your video.

Either way is fine.

For sound, I use applications where I purchase third-party services myself and include them in the final price, although we can choose them together before purchasing. But if you already know what music you want to use and which voice to utilize, you can simply send them to me and I'll incorporate them into the project.

That would be very helpful and would shorten the production timeline, but it is not really necessary. If you don't have visuals of your product, we can work together to produce them.