A:AnswerYou can add the MLB channel via the channel store. Adding channels is free but you either have to pay for the MLB service or sign into your existing account.
A:AnswerNot directly. There are multiple cable-over-the-Internet style services, which often nave some sort of recording functionality, and those services work on Roku, but the services are expensive, way more than I can afford.
With most cheaper or ad supported streaming services you don’t need to record because it’s all on demand. I use a Tivo Bolt to record my local networks plus use some streaming services too for other stuff I want.
A:AnswerFor many of the channels you mention, you will need to subscribe to a service like Sling or YoutubeTV to get access. Others may have standalone subscriptions to allow you to access content.
A:AnswerYou can go online and ask for private channel codes but you need a roku account. It takes time to enter all the channels you want but you only do it once and it is worth the effort
A:AnswerTo activate your device you will need internet access. No way around that.
Once activated, you can use it with your home local network media servers like plex, emby or similar, you just need wifi (any N or newer access point or router will do).
If you have an ethernet model (like the ultra), you can connect with a wire or an SD card.
If you have a smartphone with internet access and a lot of data on your plan, you can use it as a hotspot to connect to the internet. It's what I did when the internet was down at a hotel I visited some time ago.
But to truly make the most of it, you will definitely need internet access of some sort
A:AnswerYou can not record comcast cable without the Xfinity DVR box. I believe you can pause what your watching but it very limited on any other features such as fast forward, slow motion, ect.
A:AnswerYou can search the Roku channel store to see what channels are available. However, most cord cutters use a service such as Sling, Youtube TV, or Hulu to get "cable channels." The channels available on these services vary based on the package you buy.