Hmm… very nice animation, though I have a few (hopefully constructive - I'm no animator) criticisms to make:
1. The theropod here feels too 'light'. I think it's mainly due to the rapid, excessive and overly synchronized bobbing of the head and forelimbs. Perhaps a delay between the two might imply more weight? I suspect that if the 'bobbing' motion was slowed down, it would definitely help to make this dino feel more 'weighty' (something along the lines of a few tonnes) instead of being probably the weight of a heavy turkey. Otherwise, maybe reduce the range of motion for the forelimbs.
2. The animation of the tail seems a bit stiff, especially regarding the tip of the tail, which is usually depicted as being a bit 'whiplike' in motion. In general, most animal tails do tend to be quite flexible at the end, so it'd be nice if it could be reflected
3. Perhaps it's due to the speed of the animation, but it feels like the main body (midriff) is swinging a little too much - to the point where it looks like its about to topple over. I think it might be alright to keep the midriff more stable, while keeping the swing in the tail and head, or perhaps adding a sort of 'rippling flesh' effect to make it seem as if some of the impact of pushing off from the ground is being absorbed by the flesh.
Apart form that, splendid work, especially given the lack of reference-use