I think his point was that if you had actually watched the video, it would have given you a different perspective. The Catholic Priest in the video states directly that he has no power, but that he is just the conduit through which the Lord works. That didn't sound to me as if it was "done in a very proud and boastful manner", as you suggested. But again, had you watched it, you would have seen how humble the man was.
I think if one gives his point and uses a video or link to support his point, it would be more responsible. In other words, you make yourself responsible for what is said in the video.
And, the humbleness of the one performing an exorcism is not all that I addressed. So, it seems you also ignore my post and just cherry pick what you want. It's common on forums. Cheap and easy knowledge. Just provide a link. Just provide a video. Makes me so smart.