Here is but a preview of the thought process and frequent tongue-tiedness that goes behind my videos! (seriously, these five minutes were cut out of about 3+ hours of footage...)
I don't generally have scripts for my videos (and they sound super stilted and awkward when I do), at most I have a vaguely written list of bullet points I want to get to, and then I wing it. Sometimes I'll practice a sentence for what I want to say on the fly. It's probably not the best method for doing videos, but it's what works for me....so there you go!
See the non-blooper final video here: toplesstopics.org/resolutions/