CTRL + Click), you'll see the video codec type to be listed as External Encoder, if the hardware acceleration is working. CPU load may not decrease always, and there isn't an easy way to tell which encoder is being used, but if it says the codec is
h264, then it's likely still using just software.
42e01fshould trigger the OpenH264 software encoder, if available.
42e01fof H264. Hardware-encoded version of H264 may not be compatible with all browsers, such as with Safari viewers, so its not advised.