0h8huj5bwnfgbnxhoir75_720p.mp4

Because this is a randomly generated alphanumeric string rather than a known public topic, there isn't a specific subject to write about without more context. These types of filenames are often used by content delivery networks to uniquely identify media files.

If you can describe what happens in the video or provide the source where you found it, I can help you write a post about: The featured in the clip. A technical explanation of why files are named this way. A creative caption for sharing that specific video. 0h8huj5bwnfgbnxhoir75_720p.mp4