My name is Alex and I am one of the Support Engineers at JW Player. I will be more than happy to assist you with your questions.
When modestbranding is set to 0, this means that it is not enabled. As per YouTube’s documentation setting that parameter to 1 would enable the feature. There is no built-in functionality or a setting in the player setup to change this, nor are our engineers planning on changing that. However, our YouTube provider is open-source and can be found here. You can edit the parameter there, host it on your server and then point to that file when embedding a YouTube video using the baseconfiguration option.
Please let me know if you need any more help or have any other questions.
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