I don't know, but this happened to me once. I just went back to edit the post. I deleted the video and re-loaded it again. I guess for some reason it just doesn't work sometimes. This is my best attempt at sounding tech savvy. Pretty sad, I know.
I am completely technologically unsavvy, so I have no advice. I hope you get them working soon!
I haven't been able to load movies at all, so I am no help!I thought it was an Imac problem, but maybe it's something with blogger.
I haven't loaded video on blogger since I moved over to vox but I know that sometimes there is issue with the browswer. For example, sometimes they are viewable in my Internet Explorer but not Netscape. No real idea why. I hope you get it figured out though!
Can you upload it somewhere like youtube or photobucket and then post it?