Pictures and Videos of Myself

I have been on my journey for a while and felt like I made some big changes body wise. I had some photos taken recently and some videos were posted from a gym I have been working out at (with my permission).

This has sent me spiralling. I really thought I looked different than I did when I saw myself in photos. This makes me want to take drastic dieting measures. How do I deal with this body dysmorphia?