You select a bunch of files, a mix of images and videos.
Then click Create Collection and see that "include selected photos" is ticked.
The resulting collection set does not contain you video files.
There is no option to include them in this dialogue box.
There is no warning or message that LR is ignoring the video files.
You can still manually drag the videos in, so adding them is possible.
Please change that option to "include selected files."?
We have plenty of filtering options, so really we don't need more in the Create Collection box. It should be create an empty collection or add everything that is selected.
Thanks,
B