It.s popular and good but if you are at work and do not have admin rights on your computer or are on someelses that you do not want to download and install stuff then you will not be able to play it. This has been my experience that if you want to most number of people to be able to see it without problems, then use something that works on Window Media player. Not the best choice for quality but you will be able to get the highest number of hits. That is all I am saying.