quicktime download

I have quicktime pro and I am trying to download a quicktime file from safari? I have tried the view source and look for the .mov file, DOESN'T WORK ! The file is not present I don't know why, the last time I did this it was so **** easy but I forgot how I did it and every solution online is the most long winded process. How do I download a video from safari, for example apple movie trailers that play inside of safari using quicktime, how do I download that file to my computer?

thanks again