Prince Harry himself is a veteran and wanted to help make the lives of those like him, to still have meaning and be able to compete in sports that they enjoy. 

This tweet was useful because in very little words, you had information about what they were doing and the types of tasks also. It mentions how Harry will climb the Sydney Harbour Bridge, to raise the flag for the Invictus games. The tweet is concise and quick way to get information about the couple.

https://twitter.com/scobie/status/1053013331936600064

It has a photo of Meghan Markle giving a speech. There is a short paragraph of information about the event. The blog itself is not the best social media tool to use because it is focused more on the fashion and appearance of Meghan more than the issues of what their tour was about. It does have a bit of both for entertainment value.
https://madaboutmeghan.blogspot.com/2018/10/watch-invictus-games-closing-ceremony.html

This is post consisting of a photo and description making it easy to know what is happening, you are aware of the ceremony, you can see beautiful pictures of the couple and it captures their devotion to the event in place. 

You must scroll the fan page to find this post, as there is a lot of content used and it takes some searching for information. Not as readily available unless you know what you are looking for.

It links you another fan page called "The Royal Family" which shows were this fan page is getting some of it's information.
https://www.facebook.com/TheBritishMonarchy/photos/pcb.2085843991437420/2085842034770949/?type=3&theater

There are no comments made by anyone on this story, there are no pictures. You must search Reddit for exactly the content you are looking for which does not make it easily available to get information on the royal couple’s tour of Australia. If there were comments to share people’s excitement, it would entice those interested to read on but there is nothing to keep their attention.
https://www.reddit.com/r/OzNewsHeadlines/comments/9og68q/meghan_markle_and_prince_harry_tour_sydney_hours/

Instagram brings comments together and the community can discuss the photo and what they like or don’t like about it. It does not list what the speech is about but simply how the couple are showing their affection for each other. 

It lacks more information as the focus is on the photo more than anything else and is not a good platform to showcase the event. 
https://www.instagram.com/p/BpBsquPC2gx/

In very clear and a precise description, followed by the photo, it is very quick information in knowing what is taking place and can lead to more information from the 168 shares makes the post reach a broader audience all the world to keep up to date with the event.
https://twitter.com/ianvogler/status/1053443747730444288

There is no commentary on the photo from users of the platform, but you can share the photo which has 4 and you can “heart” the photo which as 8. Considering the popularity of the couple and this social media lacking to provide further information on what the events the couple are attending. Why are they walking on the beach? Is it for a ceremony or anything to do with the Invictus games, it is not explained?
https://www.tumblr.com/search/royal%20visit%20australia

In the video it shows the places the royal couple visited and what they did at those places, such as revealing plaques etc. This gentleman was able to bring humor across to keep the audience attention and YouTube is a very good platform for this because humor is expressed much better in video form.

If you want to know more accuracy about what was seen in the video, you would have to research it and gain more knowledge that way, as funny as it was, it can lack genuine facts.
https://www.youtube.com/watch?v=SMaL-eJJStQ