5-minute before an online meeting is the hard time because we need to separate our mind both for checking the clock and keeping working on what we are doing. This does not guaratee we won't miss 1, or 2, or sometimes 10 minutes.
This simple script is to help us early register online meeting, then it will open the link on time.
Let's assume that we set alias to the file as zoomin
alias zoomin="sh /path/to/zoomin.sh"