Add new option to configured sdk urls

[maxired]

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Current Behavior

Hi,

the library is loading libraries such as hls library from external cdn

Expected Behavior

User should be able to configure it own domain to load required library

Steps to Reproduce

Environment

• URL attempting to play:
• Browser:
• Operating system:
• jsFiddle example: https://jsfiddle.net/sv5x3ug1

Other Information