Well, this is a video in another language (which I can’t understand) without any provided translation. The video itself is short snippets of moments, and doesn’t show any context. Also, it’s unclear if the audio and video are completely in time-sync or not for parts of the video.
The description of the video does not have a transcript or a link to a video with more context of the situation. It looks like the first one was a children’s mass or event. It’s unclear to me any actual timeline of the events portrayed in this video.
I’m going to say doing a tango during Mass is inappropriate. Having said that, I don’t even know if mass was actually going on. There’s a snippet of mass being held, and then it goes into a couple doing the tango. That does not mean the tango was done during mass. That’s simply what the person who created the video wants you to think.
This video is completely useless without a translation and without context (preferably, a link to the full video for both events).