allow custom videoPath in url

[clkao]

requirement from the popcorntime fork

[mafintosh]

hmm. this seems a bit weird / coupled to me. i'd be open to a catchAll: true option that would return the index file instead of 404 though

[KeizerDev]

I'm building a application who's uploading files and my file provider store files by file name using the last param like https://server.com:1233/myfile.mp4 i'd like to see that be supported for peerflix.