Hello Charles,
Thank you for getting back to me. Interestingly enough, I watched this very video shortly after buying my 2015 Toyota Avalon. Unfortunately, the video was not helpful, as it is filmed in a Toyota Camry - not a Toyota Avalon. The design of the two cars is different.
For example, although Toyota Camry's have a convenient compartment beneath the driver's seat, through which the upper and lower mat clips may be accessed, removed and replaced.
However, my 2015 Toyota Avalon XLE/Prem/Tour/Ltd VIN: 4T1BK1EB3FU191266, does not have a similar opening in the carpet beneath the driver's seat.
So, I'm back to the drawing board.
Please provide me with instructions explaining how I may access, remove and replace the upper and lower mat clips.
Thank you for your attention. I will look forward to receiving your reply. Ed