The video ends when I have the neckband pinned. This pic is the sewn neckband. I sewed the neckband together at the ends and to the opening with a 3/8th width seam allowance. You can use a lightening stitch (tiny zig zag) to attach it. I used a regular straight stitch. I do not usually have popped seams for some reason. I stretched the band to fit the neck opening between pins making sure to match the edges up well.
Here is a close up of the tiny dart I used to make the v neck. If the dart is too bulky, just cut it on the fold so that it lays flat when pressed.
Pressed, but do not leave it this way. The seam allowances need to be sewn down.
I sewed the seam allowance down with a zig zag stitch. A double needle stitch, a cover stitch or another decorative stitch works well too. No gaping!
((Sewing hugs from me to you!))