A:AnswerLooked mine over and I do not see any slots for a SIM card. Not saying an adapter wouldn't work if there is something like that, but as is, it doesn't appear compatible.
A:AnswerWe’ve never tried because we still have the one that came with it. I would assume you can since it’s touch screen. I’m pretty sure you can like you can with any touch screen.
A:AnswerWhile the light weight makes it attractive for use on the go, the metal case gets uncomfortably hot and battery life is limited. The intense load of video editing would make all of that even worse, so I'd say no. Beyond that, keep in mind that this is a CHROMEBOOK, not a Windows laptop, so your editing software options will be limited.
A:AnswerIt seems to work fine with USB-C connected external disk drives, so that should be fine if using data disks. Keep in mind that this is a Chromebook, so video playback options will be somewhat rudimentary. I don't know if software is available for DVD or BD playback on Chrome OS, so you might want to research that to understand the options before considering a Chromebook for that use.