Are you trying to include a video in a post? You can post directly from YouTube, which is supported. Click the three dots next to the emoji icon in the bar above the reply box, choose Media, and paste the YouTube link. That will embed the video.
Yes but I was trying to upload a video to my album here on this site which I get an error. Under the top tab of media. It worked before but since the site update it hasn't. Forgot to mention before I was able to just upload from my computer. Now it's changed I suppose. Which is fine just want to make sure I'm not going any crazier than I am already lol