Generally speaking, this is light entertainment meant to show that things are not always as they appear, and just because something is old does not mean it is un-useful.
The advantage of a modern tractor over an old steamer is basically 'convienence'; it is not convientent to:
* Start the old steamer
* Run the old steamer
* Move the old steamer from field to field
* Do anything but pull something or run a belt drive
* shut down the old steamer
But all that doesn't mean it can't get the job done, as shown in the video!
I think the video makes a good statement about the ingenuity of man; those praries needed plowed, and so men invented the tools to do it, over a century ago! And those tools can still hold their own today!