There is 1 plugin that seems to support H.264, the rest are H.265. I tried the following plugins:

• “Transcode Video Files” with the following options selected
  • Video Code = H264
  • Video Encoder = hvec_qvc
• "Video Encoder H265/HEVC - hevc_vaapi (INTEL/AMD)"
• “Video Encoder H265/HEVC - hevc_qsv (Intel)”

None of them worked.