Video Profile for Player Compatibility (based on intro1.mp4)

Codec:      H.264
Profile:    Main
Resolution: 1920x1080
Bitrate:    ~14,700 kbps
Framerate:  29.97 fps

Recommended ffmpeg conversion command:

ffmpeg -i input.mp4 -c:v libx264 -profile:v main -b:v 14700k -vf "scale=1920:1080,fps=29.97" -c:a copy output_normalized.mp4