Embedded Player on My Blog is not viewable by Friends who download DivX linkups

Hello.. my problem is a long running one with placing a video player into my blog that all my friends can see. I will give a short story to give background .. bear with me.. you will need all this info.
I am running Xp and IE7. If I put a Windows Media Player embedded into my blogs at Yahoo360 or Multiply.com.. those who are running IE can view them.. but those with Firefox can't even with the plug in they have.
They have stopped allowing script access into the blogs .. it is a security risk they say.. So it blocked mine.. threw a fit.. they gave me a code to make it work.. for a while.. then they started uploading their own .fla videos and giving us embedd codes.. they suck! I want to do my own.. so I tried Quicktime.. I tried Adobe.. they don't work. no one can see them, but me.. and I do it right!
They no longer allow object tags to be used.. but embed tags they say is okay with script access -never..
So I have tried out your product.. I am ecstatic at the quality of my videos.. but same problem.. used your link back to you.. plus all the other links you provided to get the stuff needed to view it.. NOPE! I would really and truly love to purchase the upgrade in a lot of your stuff.. but if it doesn't work.. well.. you understand I am sure.. Can you help a lady out with this one you guys?

It works great for me.. not a glitch one.. but friends get alerts from REal Player to update but no updates available.. green and gray rectangle.. would put my blog link up here .. but well I am scared to..

thanks lockerridge