No. Under the Campus website terms and conditions, you may not share your MyLI login or Campus subscription with someone else.
The relevant part of the terms and conditions is:
3.2 The right of access to videos of events on the website is personal to users who have a MyLI account (“registered users”) and this access is for the benefit of registered users only, for as long as your purchase or subscription is valid and for as long as we permit such access. You may not share your MyLI account with any other person and you are responsible for preventing unauthorised access to your MyLI account and the videos of events. By holding a MyLI account you accept responsibility for all activities that occur under your account or password. Registered users must notify the Landscape Institute immediately if they are aware of or suspect any unauthorised use of the website and/or the content on the website.