If the file size is too large for sharing, use tools like Handbrake to reduce it without losing much quality.
Based on the filename "b_066.mp4", this appears to be a , likely from a batch of 66 or a specific data set. b_066.mp4
If you can share this is (a tutorial, a raw scene, a product demo?), I can provide more specific advice on how to use it. If the file size is too large for