that looks great. Yeah, I'm still figuring out the business model. I think a one time purchase is probably what I'm going to do. BTW, after launching it in Product Hunt I saw a few similar ideas too :)
didn't know about docdrop, I thought it was similar to Annotate.tv but I got: "Our video annotation capability works for YouTube videos that have either human or machine-generated transcripts.". That's not a requisite on Annotate.