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:
Look for the page you were visiting right before or at the time you saw this filename. 0hbbw5sfm8p69t771w868_source.mp4
Could you describe or tell me where you found the link ? I can help you track down the original post or context from there. Files shared across these platforms are often renamed