Thanks for the additional information.
I am going to work with my team to try and understand why the lightbox doesn’t accept the ? for the parameter and will let you know what I hear.
You are correct, copying and pasting the description from YouTube will not provide the look and feel you are going for. Essentially the data being copied is just text and it will, in turn, be displayed as text.
The easiest way would be to copy and paste the link in the description of the YouTube video into the lightbox source. Copying and pasting that link directly should work, as it already is using the & for the time parameter.
If you wanted to automate this, in turn, there would still be a bit of manual copying and pasting to develop the same look and feel.
If you were to create a CMS collection entitled “Video 1” (or whatever the name of the video is), you could then create a number field with the second you want the video to start at. On your page, you would add a collection list, which would then display each of the bookmarked times for your video. Also within the collection list would be a custom code embed with the youtube iframe. the iFrame would then contain a variable with the number field in your collection of where to start the video.
That may actually take more work and time than copying and pasting, but would be a way to automate it.
Alternatively, you could also look into some sort of automated process using Zapier or Integromat to dynamically create CMS items based on copying and pasting the description from the YouTube video into some sort of form.
I will crosspost this in the forum as well.
Let me know if that helps.