Files shared across these platforms are often renamed to long alphanumeric strings to avoid filename conflicts. To find the "story" behind it, you can try:
Could you describe or tell me where you found the link ? I can help you track down the original post or context from there. 0hbbw5sfm8p69t771w868_source.mp4
If you have a URL containing this string, the domain (like v.redd.it or discordapp.net ) will reveal the platform it came from. Files shared across these platforms are often renamed