Use published re_mp4 (#7719)

### Checklist
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Guide](https://github.com/rerun-io/rerun/blob/main/CONTRIBUTING.md) and
the [Code of
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* [x] I've included a screenshot or gif (if applicable)
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* Using examples from latest `main` build:
[rerun.io/viewer](https://rerun.io/viewer/pr/7719?manifest_url=https://app.rerun.io/version/main/examples_manifest.json)
* Using full set of examples from `nightly` build:
[rerun.io/viewer](https://rerun.io/viewer/pr/7719?manifest_url=https://app.rerun.io/version/nightly/examples_manifest.json)
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* [x] If have noted any breaking changes to the log API in
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- [PR Build Summary](https://build.rerun.io/pr/7719)
- [Recent benchmark results](https://build.rerun.io/graphs/crates.html)
- [Wasm size tracking](https://build.rerun.io/graphs/sizes.html)

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Cargo.lock

@@ -5357,7 +5357,8 @@ dependencies = [
 [[package]]
 name = "re_mp4"
 version = "0.1.0"
-source = "git+https://github.com/rerun-io/re_mp4?rev=8614aae24a7a39a5e7de615d83dbcbfadde7f606#8614aae24a7a39a5e7de615d83dbcbfadde7f606"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3d1e30657b1ae7f0dd3428a59dc8140732b74a22cc07763606c9ec4054138731"
 dependencies = [
  "byteorder",
  "bytes",

Cargo.toml

@@ -554,9 +554,6 @@ missing_errors_doc = "allow"
 
 # egui_commonmark = { git = "https://github.com/rerun-io/egui_commonmark", rev = "7a9dc755bfa351a3796274cb8ca87129b051c084" } # https://github.com/lampsitter/egui_commonmark/pull/65
 
-re_mp4 = { git = "https://github.com/rerun-io/re_mp4", rev = "8614aae24a7a39a5e7de615d83dbcbfadde7f606" } # main 2024-10-08
-# re_mp4 = { path = "../re_mp4" }
-
 # commit on `rerun-io/re_arrow2` `main` branch
 # https://github.com/rerun-io/re_arrow2/commit/e4717d6debc6d4474ec10db8f629f823f57bad07
 re_arrow2 = { git = "https://github.com/rerun-io/re_arrow2", rev = "e4717d6debc6d4474ec10db8f629f823f57bad07" }