Video's can be uploaded here, but only very small ones. Do you know how big it is?
Most of us who do video's longer then 10 seconds, usually have YouTube account and then upload them there, and then in here, you can paste a link to YouTube.
There is an issue with Uploading Photos (attachjments). I am not sure what the problem is, and I am looking into it. You can still try to Create your Threads and Upload your Photos, but it is hanging up during the Upload.
