HandBrake is an easy, free encoding tool. Download it here: https://handbrake.fr/.
Simian recommends the following presets:
- Format is set to MP4 File.
- Web optimized check box is checked.
- Video Codec is H.264.
- Frame Rate is the same as source.
- Average Bit Rate set between 2200 to 3500.
- Select the Audio tab in the middle of the window.
- Audio Codec is set to AAC.
Note: Get more video encoding recommendations here.