The original clip, of the fish disgorging water, i'm fine with. This is the normal behaviour of the fish when removed from water. 
The second clip, with the carrot, is animal cruelty. It is not eating the carrot, it is biting and in distress. The noises it makes are it choking, both on the carrot now blocking its throat and due to the extended period it has been out of the water. 
The fish is drawing in air to use its defensive measures, which will almost certainly cause embolism and the man handling it is being very rough, no doubt causing extreme discomfort and pain.