Streaming privacy questions usually come down to two layers: what your internet provider can see, and what a given app or service collects.
What your ISP can see
Your internet provider can generally see that streaming traffic is happening and roughly how much data is used, though the specific content is typically encrypted in transit on modern services.
Does a VPN help?
A VPN encrypts traffic between your device and the VPN server, adding a layer of privacy on top of your regular connection. See our VPN for IPTV guide for the performance trade-offs involved.
App-level data collection
Individual player apps may collect usage data depending on their own privacy practices — reviewing an app's permissions before installing is a reasonable habit.
Common mistake
Granting a player app permissions it doesn't need, like contacts or location access, when it only requires network access to function.