Keep calm and use good grammar

Some weeks ago I watched a funny video (thanks Paul Kelly for sharing) by "Weird Al" Yankovic called "Word Crimes" this video is a parody of the song " Blurred lines" by Robin Thicke and was recorded in 2013. 
All Yankovic is really concerned about proper use of grammar and has campaigned against bad use in songs, posters, ads and social media. He considers himself a "grammar nerd"

In this video he mocks on line commenters, misspelling, abuse of numbers instead of letters, language on SMS, punctuation etc. 

 Watch the video and write down as many mistakes which are mentioned as you can.