Compatibility Issues

H.265 and the Codec Names

Exiftool 12.69 parsed codec name for H.265 is ‘hvc1’.

exiftool *.mp4
...
Compressor ID                   : hvc1
...
Compressor ID                   : avc1
    2 image files read

According to FourCC.org, AVC1, avc1 is

fourcc: AVC1
AVC1 info
Owner: Apple
Apple's version of the MPEG4 part 10/H.264 standard apparently.

and no hvc1.

Grok:

Why 'hvc1' Appears in Your Files

Your exiftool output showing 'hvc1' indicates that the MP4 file was likely
created or optimized for streaming or playback in environments expecting MP4
compatibility (e.g., web browsers, mobile devices). This is consistent with
the "Multimedia Cloud Transcode (cloud.baidu.com)" encoder you saw, which
probably used 'hvc1' to ensure compatibility with modern players while
leveraging H.265’s efficiency.

To convert codec

./ffmpeg -i 2024-07/010V\ mda-qc38bb8jwum66ied.mp4 -c:v libx264 -c:a aac "010V mda-qc38bb8jwum66ied.h264.mp4"

Tests shows Android 10 WebView cannot display ‘hvc1’.

References:

Grok Answers
FourCC.org
Information technology — Coding of audio-visual objects, Part 15: Carriage of network abstraction layer (NAL) unit structured video in the ISO base media file format, ISO/IEC 14496-15:2024
FFMPEG