Export pic from GT Gallery to XMB > Save said pics to USB memory drive > Upload onto PC > Use Flickr or similar hosting site to upload from your PC to the web > Get the BB Code from the picture hosting site and paste it into the "Insert image" box that looks like a little blue square above this text box when typing. Finish.
Jeez thats too much messing about, other sites like facebook I can upload straight from PS3! Is it that hard to do on here especially as 90% of this site is PS3 related and revolves around PS3???
Many times I wanted to enter Photo competitions on here but can't be bothered
No. Replays are not videos in the traditional sense. They are instructions for GT5 to re-render the replay while within the GT5 software environment. They aren't even coded with a valid file extension that would be of any use outside of the GT5 software. One way to get a vid of a replay onto these forums is to use a stand alone vid capture device like a pc cam and record the vid onto a pc while it's playing back on your ps3. There are other ways of capturing the video, but are more complicated and expensive.