Videos can be uploaded to youtube.
As for pictures, there are MANY picture hosts out there... first one that comes to mind is photobucket, but there are so many.. (note: I've never used photobucket myself, as I have my own webspace).
PS: code goes best in between [ code]your arduino sketch here[ /code] tags, this will make a nice block for us to view the code, as opposed to regular text which is sort of a pain to read (for code).