fix: Fixed LCEVC decode breaking dependencies issue and read me addition (#4565)

Changes are as follows:
1. Fixed demo breaking dependencies.
2. Fixed some typos
3. Added LCEVC support section to readme.

Co-authored-by: Vinod Balakrishnan <vinod.balakrishnan@v-nova.com>

Author: vinod-balakrishnan

README.md

@@ -144,6 +144,20 @@ HLS features **not** supported:
 
 [mux.js]: https://github.com/videojs/mux.js/releases
 
+## MPEG-5 Part2 LCEVC Support
+
+**Only supported on browsers with Media Source Extensions SourceBuffer support**
+
+ - MPEG-5 Part2 LCEVC decoding support (decoding provided by [lcevc_dil.js][], must be
+   separately included)
+
+ - Integration documentation : [docs](docs/design/lcevc-integration.md)
+
+ - More on [MPEG-5 Part2 LCEVC][]
+
+[lcevc_dil.js]: https://www.npmjs.com/package/lcevc_dil.js
+[MPEG-5 Part2 LCEVC]: https://www.lcevc.org
+
 
 ## DRM support matrix
 

externs/lcevc.js

@@ -25,7 +25,7 @@ LcevcDil.LcevcDIL = class {
   /**
    * Append the video buffers before they are appended to
    * Media Source Extensions SourceBuffer. Here the lcevc data
-   * will be parsed and managed to enahnce frames based on timestamps.
+   * will be parsed and managed to enhance frames based on timestamps.
    *
    * @param {!BufferSource} data Video Buffer Data.
    * @param {string} type Type of Video Buffer Data.

externs/shaka/player.js

@@ -1236,7 +1236,7 @@ shaka.extern.CmcdConfiguration;
  *   Defaults to <code>0</code>.
  * @property {boolean} drawLogo
  *   If <code>true</code>, LCEVC Logo is placed on the top left hand corner
- *   which only appears when the LCEVC enahanced Frames are being rendered.
+ *   which only appears when the LCEVC enhanced frames are being rendered.
  *   Defaults to true for the lib but is forced to false in this integration
  *   unless explicitly set to true through config.
  *   Defaults to <code>false</code>.

package.json

@@ -72,6 +72,8 @@
       "eme-encryption-scheme-polyfill/index.js",
       "es6-promise-polyfill/promise.min.js",
       "google-closure-library/closure/goog/base.js",
+      "lcevc_dil.js/dist/lcevc_dil.min.js",
+      "lcevc_dil.js/dist/liblcevc_dpi.wasm",
       "less/dist/less.js",
       "material-design-lite/dist/material.indigo-blue.min.css",
       "material-design-lite/dist/material.min.js",