Thank you for the feedback! You are not alone with this, you can find similar suggestions in the Github project [1, 2] but I am afraid that I don't know if/when I will be able to implement those, sorry!

:: Simon

[1] https://github.com/sniklaus/youtube-watchmarker/issues/65
[2] https://github.com/sniklaus/youtube-watchmarker/issues/68