HandBrake is an easy, free encoding tool. Download it here: https://handbrake.fr/.

Simian recommends the following presets:

  1. Format is set to MP4 File.
  2. Web optimized box is checked.
  3. Video Codec is H.264.
  4. Framerate is the same as source.
  5. Average Bitrate set between 2200 to 3500.
  6. Select the Audio tab in the middle of the window.
  7. Audio Codec is set to AAC.

Note: Get more video encoding recommendations here.