Youtube and Facebook: Simply COPY LINK and 'send to a friend'. They can copy this link and then the App will ask if they want to record as soon as they open it.

News stories/ Websites: Again, simply copy the website address and send it to the person/ people you want to see their response too.

Pictures/ videos on device: Simply click on the 'Camera Roll' option on the App's home page and start filming your reaction to a downloaded video or a selected photo slideshow.