Video buffering

I’ve just uploaded my first video and it keeps buffering every 5 seconds or so. Can anyone tell me how I fix it so the video will play from start to finish without buffering?

What kind of video, what format, what browser? We simply do a lazy HTTP
streaming.

http://razuna.nwhealth.edu/index.cfm?fa=c.main&_v=EE5ADFCDC32844BE814B0BF205ABF503

That doesn’t help as the link doesn’t go to the asset. Please answer the
questions. Thank you.