A:AnswerYes, you can download the Chrome browser. You can not install Chrome OS, however, if that's what you meant. This is a Windows computer, not a Chromebook.
A:AnswerYes to the streaming video well, but I'm not sure what you mean when describing the desired photo software options. It has the standard Windows 10 Photo program installed. If you're referring to making a PowerPoint presentation or a photo page in Word, you would need to install Microsoft Office.
A:AnswerDepending on your editing program, you can probably do so, but you won't be able to see it play back in 4K on this display, and the computer might not keep up flawlessly with the playback.