h264ify - force youtube to use h264 instead of the VP8/VP9 codecs. Unlike h264, which can benefit from hardware decoding, VP8/VP9 are completely done by the CPU, so they eat battery like crazy on laptops.
just make sure your gpu supports accelerated h264 in all formats you are interested in (1080@60, 4K etc), otherwise Chrome will use its own internal SLOW AS CRAP unoptimized SINGLE THREADED software decoder which cant handle 1080@60 on 4GHz Haswell. While supposedly more cpu intensive VP9 plays just fine, Im sure its just coincidence.
