Take him to a vet that specializes in exotics. I can't see the video (NetNanny at work) but staring straight up for hours and wheezing sounds more like a respiratory infection than IBD.
There is a blood test for IBD, your vet will have to overnight a sample to the lab if you want the test done.
http://labs.vetmed.ufl.edu/sample-re...ions/boid-ibd/
http://labs.vetmed.ufl.edu/sample-re...ed-infections/
In the meantime keep this snake well away from any others you may have, increase his temps to 83*F low / 92*F high, up his humidity, and handle him as little as possible.
ETA: Now that I can see the video, why in the name of all that's holy do you have the heat tape inside the enclosure?!?!?!