I have been trying the php pseudo-streaming today in beta 2.8. I now have it working (after help from admin) and additional hassle but what I have found is, if you upload your own video which gets injected with metadata by flvtool2, the seeking works fine. However, the pseudo-streaming does not work with videos downloaded from youtube in the admin area. Im assuming the videos have not been injected on youtubes side (though highly doubtful) or the videos arent being converted correctly by vshare. Does anyone else have any idea why youtube videos cant seek??