Ok let's over analyze this picture and video.
1) If you look very closely Dak in the photo seems to be favoring his right leg leaning slightly to his left. Also his right boot looks swollen. Based on this photo I wonder if he will ever get back on the field.
2) Fast forward to the 17 mark Dak appears to be walking around, but in this video he's moving very slowly. His backpedal looks slow too and doesn't seem like he can run or throw a football based on this video.
3) Did you see that kids throw shortly after? Let's let Dak walk and sign him. He has great poise and accuracy on the practice field and Dak can't compete.
I thought I would strike first with the ridiculous conclusions some will make from a photo and video. Basically all we know is Dak can walk and stand without crutches.