Premiere Pro: How add a morph cut to the beginning and end of one clip - Loop

Hello everyone!

I have made a video portrait of a person looking into the camera. This video is supposed to run as a background on a website.
Since the video will loop I dont want any cut / shifting to be seen.

What i did so far is to take the clip which i choose....copied it and pasted a morph cut in between the two identical clips.
There the outcome works great and the one cant see any kind of transition.

Yet I dont want to add clip after clip after clip because this would increase the file size and eventually the video would come to an end...start again...and there one would see the cut / shift.

My question is how can i tell the clip to morph right at the end to what is in the beginning of the clip.

That would be super helpful to know.

Looking forward to hear what your ideas are.