Just got the handy, do I need to download a video to use the funscript?

Also: There are Tempermonkeyscripts to Stream directly from Pornhub an xhamster. However, these require that you use a browser that is capable of running user scripts. Internet Explorer and Safari are “unusable”.

But if you use these, you will have to tinker a bit with the delay-settings. (My) Experience has shown that the Funscript always is a few milliseconds ahead of the video.

That way you only have to download the Funscript.