What is a data bundle?
There are two ways to download data on your phone.
One is via wi fi and the other is using the internet via the phone (called Mobile Data).
If you use wi fi then it is free to download data and use the internet and youtube and so on.
But if you use the internet on your phone (Mobile Data) then this will cost you money.
Most companies offer a "data bundle" where you can download so much data as part of the monthly cost. This may be to download 1 Gigabyte of data per month, or 2 Gigabyte of data per month and so on.
If you download more than your allotted amount it will cost you EXTRA MONEY.
You need to check with EE what your data bundle per month is.
If you have already watched hours of YouTube you MAY have already gone over your monthly allowance so you need to check with EE.
It is ALWAYS best to access the internet via wi fi rather than Mobile Data as this is free.
Note you can turn Mobile Data on and off on your phone, as well as turning wi fi on and off on your phone if you want to.