Quote from the video: "Back in the 2000s he was fighting against the US... Since then the frontlines have shifted, the US now supports Abu Azrael's militia." So now they are the good guys after all.
The same goes with ISIS - the US arms them, supports them and calls the world threat at the same time.
If you think ISIS is armed with toyotas and AK-47, read this -
reuters.com article. Just a single report leaked to media, just another day in Iraqi army.