Here is one critique:
You seem to have a very awkward fighting stance and because of that, you do not derive any power from your legs (which is where the majority should be coming from).
I know it's "acting" but to sell it, it needs to look real and it never will if you don't use your legs.
I know what you mean, since I took boxing and used to street fight. At first, I tried to just use my boxing stance completely, but there are some stage combat techniques that require your arms/hands/legs to be in certain spots/positions. I tried my best to emulate the boxing stance while being able to pull off the theater techniques, but it just didn't end up working out.
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