In terms of having the pants stretch out by what it seems by the width and not the length:
1. 205,000 views:
As for how to stretch the length of the shirt:
1. While not a video, these tips are worth a try:
Hope that this info was found helpful.
I hope that with these instructions that you can have your pieces of clothing looking and wearing like you want. Hope that my help was found useful as if you could take a second to rate my assistance so that I know my assistance was found useful today.