A mix of Scots and English
Scots words over the flag of Scotland
Scots & Elfdalian
If you want to understand how close Norwegian, Danish, and Swedish are, you might try listening to or reading Scots. Some consider it to be a dialect of English, but it is generally accepted to be its own language - having diverged separately from Early Middle English. I don't understand everything this speaker (left) is saying, but I'm fairly certain he's talking about the English-speaking school system correcting his Scots for being "bad English."
The video description is inaccurate, or misleading at best: the speaker is mixing Scots and English - he is not just speaking Scots here. This is an example of how a closely related language gets confused for a dialect of the dominant language. This doesn't really happen with the aforementioned Nordic languages due to national boundaries as well as the lack of a dominant language amongst the three.
To hear Scots by itself, click here.