Pics in good lighting and without cage bars would help. Check her crop really well by pushing feathers back. Check her throat really good as well. Look for punctures. You're way bigger than her - If she fights you, tell her to deal with it. It's for her own good. Do you have a helper?
Do not ever hang a chicken upside down. Just pin her wings to her back and get a firm grip on her body. You're not going to hurt her by holding her.
Give her just plain water. She doesn't need to be seasoned. I would also stop the yogurt. Try a moist mash instead. Maybe some plain scrambled egg.
For videos, you'll have to upload to a third party platform such as YouTube or Vimeo. Then copy and paste the link here.