Beauty Can Braid is probably one of the best braiders on youtube and she did a video demonstrating how you can braid your hair when you have very weak or thin edges.
The key to ensuring that you protect your edges is the braid pattern, in the video, you will notice that she uses braid hair to reinforce the edges of her client and she braids in the natural direction of the edges.
When she was finished with the braid pattern she was able to crochet the hair into the braids where they looked like individual extensions. This video is pretty darn awesome, watch below:
Bookmark this video the next time you get your hair braided or crocheted to ensure that your stylist protects your edges.