In the video transcription, the speaker explains how to assign a task to someone by mentioning their email address in the assigned task. They demonstrate clicking on the assigned task and inputting the recipient's email address. The speaker then enters their own email address and specifies that the person with the provided email address should receive the task notification. They conclude by mentioning that they have written a subject line for the task email. The video provides a step-by-step guide on how to assign tasks to individuals using email notifications. #vizard