I haven't watched YouTube on Kinoma in some time; but this past weekend, I went to use it and it didn't work. It always tells me it may be an invalid file, unsupported format, etc. No matter what I try, so I think it's universal. I am using version 4.5.5. I know they are not supporting this product anymore; but I think the forums are still open and will post there as well. Any help would be appreciated. Thanks.