Manni, the photos are mostly AAF photos from fold3.com. I think the picture of the men in the plane is also an AAF photo. It can be found in many places on the web.
For those trying to follow this discussion, we are talking about a shared Google Drive about the crash here:
https://drive.google.com/drive/folde...1QKeLKMxgLXWpu
I am continuing to add material to the Google Drive as we go.
The linked videos (on youtube) are from various sources. The video showing the April 1945 missions appears to have been taken in the 323rd BG as the squadron codes are squadrons in the 323rd BG, i.e. WT - 456th BS, VT - 453rd BS, YU-455th BS.