I'll build on what John of MT says. When I first started with Guitar Tricks I had DSL from my local phone company at 1.5 Mbs. The videos would constantly be caching and it was very frustrating.

I switched over to my cable company's services at 20 Mbs. The difference was night and day. Now I can stream GT and other videos without any problem.

You may not need to switch internet providers. Companies are constantly upgrading their services, although you may need to upgrade your modem to accommodate the higher internet speeds. But it would also pay to call some of the competitors to see what they're offering. My personal experience was that my local cable company was much more aggressive about investing in cable speeds than was my phone company.

It would make sense to contact your internet provider to see how fast your current service is and what faster options they offer.