HTML 5 Video Tag not working in SharePoint

So, The issue here is that HTML 5 Video tag does not work when hosted in SharePoint library.

Issue resolution is to enable Blob cache and make sure mp4 is listed in path variable

  1. Open your web.config.
  1. Search for “blobcache”.
  1. Set “enable” to True.
  1. Set “maxsize” to 5. (Optional. In this step 5 means 5 Gb of cache is allowed)
  1. Ensure that mp4 is listed in “path” value.

Other option is to host your mp4 video outside SharePoint.