Yes, just like this very bbpress forum and post option, if that is what you mean. It works fine swith other links, for example Ebay and various websites, but the strange behaviour starts as soon as a Youtube link or blogspot link is copied into the text field. It won’t post the message, just prompts a download of literally ‘a file’.
Attaching images, copying in all sorts of other links works just fine. Except from Youtube or websites related to blogs/vlogs.