src="https://clips.twitch.tv/embed?clip=ObeseUnusualSnakeEagleEye-i9me5X1TK9hA9Y_D&parent=localhost/clips&parent=localhost"
is wrong
src="https://clips.twitch.tv/embed?clip=ObeseUnusualSnakeEagleEye-i9me5X1TK9hA9Y_D&parent=localhost"
parents should be domain names only.
You included a parent with a path and that caused the problem