The Javascript SDK is the most powerfull Way to integrate nexxPLAY into a Website. Via the SDK, you can control the Player in every possible Way and change its Functionalities, Layout and Options whenever and whereever needed.
If you have a JS SDK Integration already, you might want to add more Functionality with Addons and Widgets.
Nevertheless, as it requires a lot of Javascript Knowledge, in some Scenarios, it may be more suitable, to use the more easy to handle iFrame Integration.