I'm a big fan of using video to promote your business. We humans are very visual animals, this is one reason good photos are so important when you're selling handmade products. When the photos are also moving that grabs our attention even more.
Now one of the problems with using YouTube for promotion is that usually the only place you can put a link is in your description and many users ignore the description, even more so since YouTube redesigned the video pages to hide most of the description. There is a way around this, using YouTube's Promoted Videos you can put what YouTube calls a "call to action overlay" on your video that can contain a link to your shop. This will cost a little bit of money, because it is an advertising program, but there are ways to minimize how much you spend.
Here's a video that describes how to set up a Promoted Video and use the call to action overlay. YouTube gives you very few characters to write your message so choose your words carefully and be creative.
Here's an example of one of my videos using this overlay (apparently it doesn't work on embedded videos so you'll need to go click the link to the video on youtube to see it in action). If you have ad blocking software you might need to disable it to see the overlay.
Photobucket. You can then use it on your overlay to add just a tiny bit more branding. I recommend using your logo or a portion of it like I did.