Hello,
I have just noticed, that when I open my account and click "videos", I can only load 200 videos maximum by clicking the "show more" repeatedly. My channel contains more than 200 public videos.
That means, older videos can not be probably accessed by other users.
Could you please verify in your channel, if you have one, that you can load more than 200 videos?
I have found a brief notice of the problem here:
https://support.google.com/youtube/thread/3707366?hl=enPlease up-vote and comment if you have the same issue.