Have you tried putting a notice about your content publishing(not just the questions page, few people look deep in history), like in the main page? If you do not think that "one vidoe/song whenever i'm done" will work, then how about an approximate? I think 1 per month is a pretty fair approximate - a team of content creators with 5 million followers(https://www.youtube.com/channel/UCsXVk37bltHxD1rDPwtNM8Q) did this and they do not seem bothered by "y u no make vidz u lazy".
very focused on making it 2 weeks. the 3 minute songs will be a challenge, especially if every alternating one is live action, but i will make it happen