I think that's a good idea. I'm sure the people who are close enough to the site to use the downloads are understanding of the situation and your dependency on views. As for a time frame, I think it should depend on the frequency of new content. I wouldn't get too far behind and be posting the download for 46 while streaming 49, but I also wouldn't go too soon. Perhaps posting the previous video for download when posting the next video for streaming. If that becoming an unreasonable amount of time, maybe set a cap time of a month?