So I just watched a bunch of videos and there are some amount of misplays. You notice some of them, but others you completely ignore which shows you are fairly inexperienced with the deck or in general.

I'm gonna write them down on the weekend as I'm currently really busy, but the ones that struck me the most include brainstorming end of turn without a fetch as a follow-up/when it isn't that necessary to brainstorm, or in the last match of the first video you don't see the line that you can daze your own buried alive and pay for it which would have resulted in you being able to actually keep the Death's Shadow in hand which you eded up dazing (here).