On December 18, Internet-channel News Front in its program “Novorossia news summary” presented old video images, filmed near Mariupol airport, as an actual video.

An anchorwoman tells that Ukrainian Army builds up the defenses at the approaches to Mariupol. A video showing military machinery is demonstrated as a proof of her words:

https://www.youtube.com/watch?v=nNfuQun83is#t=25

However, this video was filmed as far back as in spring and published on Youtube on April 17.

Youtube
Youtube