There should consequences for stupidity. If in 2018 someone thinks it's okay to make such video using that phrase! then something is seriously wrong. Hopefully he will learn the hard way.
Freedom of speech does not give you the right to hurt someone with your words or be insensitive. You may try and spin this all you like, I am a firm believer in the bible saying "Out of the abundance of the heart the mouth speaks" You can only say what you have believed even in times of jokes.
What will you be defending next?
If you want a rally on the Freedom of Speech in UK please do not reference this material or video. London is full of minorities who can see themselves being the next video subject unless of you are with the BNP then it may seem okay to you.