Updated video.js to version 7.6.5

Plugins:
* videojs-contrib-hls: Dropped for native hls/dash support
* videojs-resolution-switcher: No longer maintained. Manually fixed to
work with new version
* videojs-markers: No longer maintained. Still works as expected.
* videojs-hotkeys: Updated

The (manually fixed) resolution switcher still looks a bit different.
Also video.js dropped support for older Internet Explorer and their
flash support.

static/videojs/lang/ca.js

-videojs.addLanguage("ca",{
+videojs.addLanguage('ca', {
   "Play": "Reproducció",
   "Pause": "Pausa",
   "Current Time": "Temps reproduït",
- "Duration Time": "Durada total",
+  "Duration": "Durada total",
   "Remaining Time": "Temps restant",
   "Stream Type": "Tipus de seqüència",
   "LIVE": "EN DIRECTE",

static/videojs/lang/ca.json

+{
+  "Play": "Reproducció",
+  "Pause": "Pausa",
+  "Current Time": "Temps reproduït",
+  "Duration": "Durada total",
+  "Remaining Time": "Temps restant",
+  "Stream Type": "Tipus de seqüència",
+  "LIVE": "EN DIRECTE",
+  "Loaded": "Carregat",
+  "Progress": "Progrés",
+  "Fullscreen": "Pantalla completa",
+  "Non-Fullscreen": "Pantalla no completa",
+  "Mute": "Silencia",
+  "Unmute": "Amb so",
+  "Playback Rate": "Velocitat de reproducció",
+  "Subtitles": "Subtítols",
+  "subtitles off": "Subtítols desactivats",
+  "Captions": "Llegendes",
+  "captions off": "Llegendes desactivades",
+  "Chapters": "Capítols",
+  "You aborted the media playback": "Heu interromput la reproducció del vídeo.",
+  "A network error caused the media download to fail part-way.": "Un error de la xarxa ha interromput la baixada del vídeo.",
+  "The media could not be loaded, either because the server or network failed or because the format is not supported.": "No s'ha pogut carregar el vídeo perquè el servidor o la xarxa han fallat, o bé perquè el seu format no és compatible.",
+  "The media playback was aborted due to a corruption problem or because the media used features your browser did not support.": "La reproducció de vídeo s'ha interrumput per un problema de corrupció de dades o bé perquè el vídeo demanava funcions que el vostre navegador no ofereix.",
+  "No compatible source was found for this media.": "No s'ha trobat cap font compatible amb el vídeo."
+}

static/videojs/lang/da.js

-videojs.addLanguage("da",{
+videojs.addLanguage('da', {
   "Play": "Afspil",
   "Pause": "Pause",
   "Current Time": "Aktuel tid",
- "Duration Time": "Varighed",
+  "Duration": "Varighed",
   "Remaining Time": "Resterende tid",
   "Stream Type": "Stream-type",
   "LIVE": "LIVE",