There are rules of evidence that govern authenticating the video and getting it into evidence. You should have an attorney. The rules of evidence can be found in Chapters 90 and 92 of Florida statutes.
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The admissibility of the video depends on a lot of things, so we can't say without more info. However, if it is relevant and authentic and not misleading, it will probably be admissible. If you are a party in a lawsuit, you should hire a lawyer.
Let the prosecutor worry about this. hire a personal injury lawyer, but the attack was intentional so there will be no insurance coverage available as intentional acts are excluded.