Well i think some of you that are new to Steemit and lately to DTube, you may have tumbled in the msg "Error while submitting to blockchain".
So this happens wheni you try and Upload i video in Dtube. I got this error too while i tried to upload a video and after some quick research i found the solution, but the one i found was very long article, so i decided to make one even shorter, for impatient people like me.. :)
1- Upload your video by dragging and dropping it, or click and find it on your folder.
2- After the upload of the video is finished, then upload a snap, or lets say a thumbnail for your video.
3- Then add the tittle of the video
4- Then make a quick and simple description
5- Then you must tag something, but this is important, if you did the tags before with the hashtag symbol for example like this one #bitcoin, now you must du the tag without the hashtag symbol, or like this bitcoin. And i recomend you to make a max no of tag up to 5.
6- Then in the end if your screen looks like this one here:
then you are good to go and just hit SUBMIT.
Hope this works for you cos it has work for me.