I don't think the cert is the problem. The clue is this line:
11, 0: Service does not support range requests.
Videos must be hosted on servers that support range requests.
But in this case it's a bit more involved. The URL you're using does not point directly to an mp4 file. As best I can tell, it points to an HTML page, but
sometimes will get redirected to the actual mp4 depending on the user-agent header you send with the request. Below are two curl requests to your URL. One gets redirected and one doesn't. And I was able to play the video using the URL that the second one redirects to, but I just copy/pasted
You might be able to set a custom user-agent on your roVideoScreen to get it to work. Or you might have to find a way to resolve that redirect manually in BrightScript before passing it to the video screen. In the latter case a good place to start might be roURLTansfer's HEAD request capabilities:
http://sdkdocs.roku.com/display/sdkdoc/ ... dasDynamiccurl --user-agent "Roku" --head "https://www.dropbox.com/s/5sf90bps47yd009/flexiflyer.mp4"
HTTP/1.1 200 OK
Server: nginx
Date: Wed, 29 May 2013 00:07:02 GMT
Content-Type: text/html; charset=utf-8
Connection: keep-alive
set-cookie: locale=en; expires=Mon, 28 May 2018 00:07:02 GMT; Path=/
set-cookie: gvc=Mjk4Mjg0MzQ4ODMwNzU5OTA4NzgzMzIyNjY1NDY2MzA0MzE4MjU2; expires=Mon, 28 May 2018 00:07:02 GMT; Path=/; httponly
set-cookie: t=Dq--a7UOc74bYH2wZT7sjgIr; Domain=dropbox.com; expires=Fri, 28 Jun 2013 00:07:02 GMT; Path=/; secure; httponly
strict-transport-security: max-age=2592000; includeSubDomains
x-server-response-time: 94
x-dropbox-request-id: c05e15a1c206f836
pragma: no-cache
cache-control: no-cache
x-dropbox-http-protocol: None
x-frame-options: SAMEORIGIN
X-RequestId: 1ed88dd864195fa8800591b9da6f5a4a
curl --head "https://www.dropbox.com/s/5sf90bps47yd009/flexiflyer.mp4"
HTTP/1.1 302 FOUND
Server: nginx
Date: Wed, 29 May 2013 00:07:17 GMT
Content-Type: text/html; charset=utf-8
Connection: keep-alive
set-cookie: locale=en; expires=Mon, 28 May 2018 00:07:17 GMT; Path=/
set-cookie: gvc=MTA0NDIzOTM0MDE5MjQ3Mjc4OTI4NzY2MjM0OTAwNTg3MzY2NTQ0; expires=Mon, 28 May 2018 00:07:17 GMT; Path=/; httponly
set-cookie: t=XncbJQep7QIcFVoUKzvKVjNP; Domain=dropbox.com; expires=Fri, 28 Jun 2013 00:07:17 GMT; Path=/; secure; httponly
strict-transport-security: max-age=2592000; includeSubDomains
location: https://dl.dropboxusercontent.com/s/5sf90bps47yd009/flexiflyer.mp4?token_hash=AAEbGaE8V7PKk99a4LdlRDe8S8YS0HsSKIqEMMqtTys_Rw
pragma: no-cache
cache-control: no-cache
x-dropbox-http-protocol: None
x-frame-options: SAMEORIGIN
x-dropbox-request-id: 56fa4500a5551724
X-RequestId: 9196d9a413f4d89b376b51909055d568