Most people probably know that you can easily set a YouTube video to start at any time within the video by using the ‘t’ switch, as in eg https://youtu.be/o4m5jQy5A2U?t=6, which will start after 6 seconds (or 60 or 600 etc according to the number used). This can be very handy for targeting the latter part of a longer video.
Unfortunately the YT Import extension doesn’t appear to recognise this switch but still imports the whole video. Not sure if this is a bug or if this option is simply not implemented, but either way it would be a useful feature to have.