Most internal guys like to test their internal skill against push. Very few internal guys test their internal skill against pull.
The concern is when A pulls B, if A can't pull B into him, the counter force of A's pulling will pull A into B. In other words, if a pull can establish a clinch, how to deal with a clinch will be the issue.
Will you call this guy using "internal energy"?
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I would say the "internal" way to counter a pull is not resist but step into it, to attain an advatageous position or get the opponent off balance. He seems to be doing that in the animation.
This video has several bagua counters to pulls at 4:25 and others. He's also stepping into the pull.