The poster says in her clip, shared on Sunday under the username @_auratheexplorer_, that if your dog is happy they will do things that they wouldn't otherwise do unless they felt comfortable enough.

Don’t assume that a dog who stays still while wearing a costume is happy either – they might be showing signs of deep distress and learned helplessness. This is when animals appear to “give ...

If your dog tries to avoid having a costume put on, or otherwise appears unhappy, consider leaving the dressing up for the humans in the family.