This is going to be the most basic question. Can I stream without ISP seeing the content?

I host a server at my house using Plex. I have the lifetime thing. IF I stream this across my ISP to my Laptop while I am at the Airport. Can anyone but me see the content? Will some weirdos at my ISP be able to watch my home movies or am I in the clear to stream it to myself? Is the TSL secure?

I just don’t entirely understand the language.

The stream, if using Plex Secure connection, is secure.

See: https://support.plex.tv/hc/en-us/articles/206225077-How-to-Use-Secure-Server-Connections

I am noticing through my router that the amount of data going out TLS is minimal. Is something wrong?