How do I know if my internet speed is good?

I recently moved and have found that the internet provided by my landlord causes my videos to buffer. A lot. So I ran two different internet speed tests tonight within minutes of each other (close to 3 am) – one from my ISP’s site and an independent one. The former said I had a download speed of 2.08 Mbps and upload speed of 0.50 Mbps (Ping 47 ms.) With the latter my result was 0.86 Mbps and 0.49 Mbps (Ping 57 ms). Neither of the two sites explained what these results meant for me, neither could I find a site that could give me a range of good/bad speeds. Can someone explain this for me? I’m clueless.