Thanks for the demo video.
Actually the size looks perfect to me. If you attempt to stretch full length the penis will retract and the glans will slip past the silicone ring when sitting. Girth looks good as well doesn’t appear too be tight at all. The material will break-in for a more comfortable fit after 7-10 days of wear.
If you do want active stretching to full length then I suggest the Corkscrew. You can wear this 2 to 6 hours per session depending on the time required to reach the fatigue state. This will depend on your experience with active stretchers.
Here is the link to the demo video for wearing the Corkscrew…