It is possible to watch Cleveland Cavaliers games live online or on TV without an expensive Cable TV package. Usually these games are on Fox Sports Ohio, but that may change depending on schedule, type of game or national interest.
The Cleveland Cavaliers play most of their games on Fox Sports Ohio, a regional sports network. Regional Sports Networks (RSNs) are not common on streaming services, but when they do exist they are usually only available for an additional fee.
Here are the live streaming services that carry Fox Sports Ohio: Hulu Live, YouTube TV and AT&T Now.
The NBA also has NBA.tv, which live streams all out-of-market games for all teams. Unfortunately, Cleveland Cavaliers games on here are subject to blackouts if you are within what is considered the team's "home region". If you find yourself trying to watch a game on NBA.tv that is blacked out, you will need a VPN to mask your location.
If the NBA attempts to blackout live streaming of Cleveland Cavaliers games due to you being within the their home viewing area, use a VPN to get around it. By using a VPN, or virtual private network, your home's exact location is masked. Teams then cannot determine if you are within their blackout "range", thus allowing you to watch whatever sports team you want.