Use x264 if: You want maximum compatibility. You're streaming to lots of different/older devices. You're not particularly concerned about file size. File sizes are going to be bigger than x265. Use x265 if: You want to save disk space. You're dealing with 4K/HDR. x265 take longer to encode and takes more processing power to make, but that shouldn't really worry you. It's dont think it's really a codec issue, its HVEC which is the method of compression. Some TV or media players dont support it. idk really know too much, I know certain sites have been holding off moving to x265 because the user base might not be able to play the files- Choosing x264, larger size files, easier to encode and appeal to those who might not have up-to-date tech. @Will27 I forgot to mention some decent documentaries And another Channel 5 (meh) documentary about Jeremy Bamber, kind of told that there were massive holes in the investigation and new evidence with regard to the silencer, had come out, possible appeal, (tbh, I forgot about the details lol)