From the laughable Russian propaganda:

"2014 – The Ukrainian government of Viktor Yanukovich fell under a population revolt in Kiev. The Parliament of the Autonomous Republic of Crimea voted to secede from Ukraine and for its annexation to the Russian Federation.

Ukraine's revolution and Russia's occupation of Crimea: how we got here

Military occupation of Crimea by Russia complete: Ukrainian army leaves the peninsula

You can find many more reports of how Russia took Crimea if you care to look.
You don't really believe the version from your link, do you?