hmmm... okay, on the first question: We are focused on doing 1 to 2 posts per day so if your posts are within the guidelines you can write 2 but only share one a day for this challenge.
Second: the editing tool box? You lost me. Are you talking about the Steemit editor in lieu of markdown?
Third: GOOD QUESTION! While I would think your video is perfectly fine it does beg the question, is it okay if you didn't get permission from the performers or the group. Well... uh... I'm not sure about that. It's not like you've recorded anyone with the intention of reselling the music and the attending public does not generally fall under anyone's copyright (unless you've pilfered snippets from their official music videos). Don't hold me to it, but I think you'll be fine with this. :)