Is this a volunteer effort on your part? I don't mean to be unnecessarily harsh in that case, but otherwise: I'm not sure I can any more strongly say that you

Is this a volunteer effort on your part? I don't mean to be unnecessarily harsh in that case, but otherwise: I'm not sure I can any more strongly say that you need to get this URL into these videos using whatever tools you can, whatever tools the platform provides. If someone misses it because of the ineffectiveness of the platform, you still get credit for trying! I assume it should also be the very first thing in the video description at this point. You are losing many more people who would never take the time to share this issue with you due to stale content! (There's a reason it's half-way to the top on your announcement of part 2...)