The last time i used a VideoIn + CopyTexture without issues was using “vvvv_gamma_2021.4.0-0388-ge2a327dce8”
I wasn’t in this scenario since then, so i can not say since when it’s being happening.
And yes the problem with ChangeFormat is unrelated but i wanted to report my experience in one single post.
And sorry, no much time to patch the issue, dealing with other stuff now.