Suggestsion/feature requests go here
https://twitch.uservoice.com/forums/310213-developers
There’s no official way to get the video of a clip (aside from manual download of the content from the clips page if you are the content owner or editor of the channel).
So if you are the content owner, you can do what you want with your content as it’s your content. If you are doing this with other peoples content without permission then you may be in violation of Copyright law.
I’d disagree there as people whom use Twitch expect the Clip Player to have the same UI/UX controls as the clip would of the Twitch website, so you providing a different UI/UX will confuse users if they are more used to one than the other. But thats up to you really.