This might be obvious but I suppose you need to add seam allowance when you cut the fabric to all of the edges. With the bands do you sew those on right sides together and then overlock the seam allowance? What is the closure on the back?
Hi Dear! Sorry you are having troubles with it! I have a blog post on how to make this dress pattern - it has upclose photos and detail written instructions, so hope it will be helpful. If anything - let me know, I am here to help :) Here is blog post: www.sewingjulie.com/post/how-to-draft-a-pattern-for-a-trapeze-dress
Might be the volume level on your device. I viewed this on my Motorola Moto e phone and the volume was perfect. Maybe check your device/computer settings.