Bump @justinribeiro/lite-youtube from 0.9.0 to 0.9.1 in /build/javascript (#273)

* Commit updated Javascript packages

* Bump preact from 10.5.4 to 10.5.5 in /build/javascript (#265)

* Trying a new github workflow to install javascript packages

* Bump tailwindcss from 1.9.2 to 1.9.4 in /build/javascript (#266)

Bumps [tailwindcss](https://github.com/tailwindlabs/tailwindcss) from 1.9.2 to 1.9.4.
- [Release notes](https://github.com/tailwindlabs/tailwindcss/releases)
- [Changelog](https://github.com/tailwindlabs/tailwindcss/blob/master/CHANGELOG.md)
- [Commits](https://github.com/tailwindlabs/tailwindcss/compare/v1.9.2...v1.9.4)

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* Commit updated Javascript packages

* Bump preact from 10.5.4 to 10.5.5 in /build/javascript

Bumps [preact](https://github.com/preactjs/preact) from 10.5.4 to 10.5.5.
- [Release notes](https://github.com/preactjs/preact/releases)
- [Commits](https://github.com/preactjs/preact/compare/10.5.4...10.5.5)

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* Bump @justinribeiro/lite-youtube in /build/javascript

Bumps [@justinribeiro/lite-youtube](https://github.com/justinribeiro/lite-youtube) from 0.9.0 to 0.9.1.
- [Release notes](https://github.com/justinribeiro/lite-youtube/releases)
- [Commits](https://github.com/justinribeiro/lite-youtube/commits)

Signed-off-by: dependabot[bot] <support@github.com>

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build/javascript/node_modules/@videojs/http-streaming/docs/mse.md

@@ -0,0 +1,75 @@
+# Media Source Extensions Notes
+A collection of findings experimenting with Media Source Extensions on
+Chrome 36.
+
+* Specifying an audio and video codec when creating a source buffer
+  but passing in an initialization segment with only a video track
+  results in a decode error
+
+## ISO Base Media File Format (BMFF)
+
+### Init Segment
+A working initialization segment is outlined below. It may be possible
+to trim this structure down further.
+
+- `ftyp`
+- `moov`
+  - `mvhd`
+  - `trak`
+    - `tkhd`
+    - `mdia`
+      - `mdhd`
+      - `hdlr`
+      - `minf`
+  - `mvex`
+
+### Media Segment
+The structure of a minimal media segment that actually encapsulates
+movie data is outlined below:
+
+- `moof`
+  - `mfhd`
+  - `traf`
+    - `tfhd`
+    - `tfdt`
+    - `trun` containing samples
+- `mdat`
+
+### Structure
+
+sample: time {number}, data {array}
+chunk: samples {array}
+track:  samples {array}
+segment: moov {box}, mdats {array} | moof {box}, mdats {array}, data {array}
+
+track
+  chunk
+    sample
+
+movie fragment -> track fragment -> [samples]
+
+### Sample Data Offsets
+Movie-fragment Relative Addressing: all trun data offsets are relative
+to the containing moof (?).
+
+Without default-base-is-moof, the base data offset for each trun in
+trafs after the first is the *end* of the previous traf.
+
+#### iso5/DASH Style
+moof
+|- traf (default-base-is-moof)
+|  |- trun_0 <size of moof> + 0
+|   `- trun_1 <size of moof> + 100
+`- traf (default-base-is-moof)
+   `- trun_2 <size of moof> + 300
+mdat
+|- samples_for_trun_0 (100 bytes)
+|- samples_for_trun_1 (200 bytes)
+`- samples_for_trun_2
+
+#### Single Track Style
+moof
+`- traf
+   `- trun_0 <size of moof> + 0
+mdat
+`- samples_for_trun_0