Finally, depending on the circumstances, I use two bags to carry all this when needed. I'm either using the more traditional blue Brenthaven Collins Slim Brief Bag, or as is more often the case the more casual Nylon Commuter Backpack by Everlane in dark grey crosshatch. Each are lightweight, stylish, and have just the right amount of pockets without being bulky (unfortunately, neither are currently available).
While I do have a fairly elaborate A/V setup for entertainment in my basement turned media room, what I wanted to mention here is my Roku 3 for non-4k TV streaming and Google Nest Mini (2nd gen) for music.
Each is fantastic due to their simplicity and effectiveness. Plug and Play - it's absolutely as simple as that, with no significant setup. I have the Roku plugged into an extra 36" TV which I setup on my deck at a moments notice. I use the speakers in my office and kitchen to compliment my Google Home audio setup (which includes the discontinued Chromecast Audio) to play music everywhere around my home. Of course, it also has the added benefit of making the Google Assistant more readily available.