Bukie Mabayoje
2013-10-22
640x360 resolution - codec bit rate is around 520 kbps
720p resolution - codec bit rate is around 1.5mps
Your bandwidth needs to be higher than 520 kbps if you want a 640x360 video quality or higher than 1.5 mps if you want a 720p video quality.
In conclusion, if your ISP offers a 1.5Mbs package you should be fine.