Hi @gratefulayn it would be my pleasure to help you where I can. However unfortunately I am also having problems uploading my videos to Dtube. ๐
Here is a link to a video that may be helpful to you:
If that doesn't work you can try posting on YouTube and then uploading it on the steemit.
I have been using YouTube for now.
Let me know if you have any success with YouTube after looking at the video.
Let me know if this information helps you ๐