Hello,
Right, forget your Cannonical Url input and remove what you've done (you can let it blank).
I forget that in HikaShop you have an options especially to fit your needs, here remove your category id (12-burgers).
Go to your HikaShop Main Configuration, then in Features go in SEF URL OPTIONS part, and look for "Remove products and categories id in URLs" option
This in your case may do the trick
Note : Other subject and for the next time, we
don't allow to use video to explain issue, keep in mind that one of the forum purpose is to be a references for other users, and so read text is the best way to proceed and to keep all of this fluent, later your video can be remove or can inaccessible for some users etc...
Thanks for your attention.
Regards