Video encoding is a modeling and search problem. Codecs try lots of different ways to represent the input data and do their best. You can evaluate the costs and benefits of each piece of the encoder to decide which parts to have on or off.
Obviously a speed-tuned AV1 compressor won't achieve maximum efficiency, but it might still perform better than an H264 or H265 compressor since it has more efficient tools available to it.
Video encoding is a modeling and search problem. Codecs try lots of different ways to represent the input data and do their best. You can evaluate the costs and benefits of each piece of the encoder to decide which parts to have on or off.
Obviously a speed-tuned AV1 compressor won't achieve maximum efficiency, but it might still perform better than an H264 or H265 compressor since it has more efficient tools available to it.