As you hopefully Know Those are 2 different things
For the Park WiFi Outside our bubble
here has a lot of info that might help but as said VERY fw parks can support or allow streaming. Park systems are in most cases little more than the same thing sharing your home internet login with all your neighbors would cause ... a bottleneck.
Cell phone .... weboost or a few others can boost cell reception sometimes but in Many ( most?) cases the booster in fact degrades the signal.I have one and leave it off 90% of the time.
Also, unless you have a older Grandfathered plan your streaming on a phone is most likely not unlimited like the data when used on the phone itself is. Streaming is capped normally. 3 movies can wipe out that data cap
The Question you want to ask is how can a purchase a Stand alone Hotspot and equip it with enough data to stream that doesn't cost a arm and leg. This is the Holy Grail that changes all the time with solutions coming and going monthly it seems.
I Suggest you look at the "Mobile internet resource center" web site free area and if you "Really" need internet..... spend the money on a membership.
JMO
Bill