Enable 300mb video uploads (#10497)

src/lib/media/video/errors.ts

@@ -1,6 +1,6 @@
 export class VideoTooLargeError extends Error {
   constructor() {
-    super('Videos cannot be larger than 100 MB')
+    super('Videos cannot be larger than 300 MB')
     this.name = 'VideoTooLargeError'
   }
 }