Hobby King TX/Rx systems usually contain a usb plug to fit a GoPro. Some have an intergrated screen. Cost is about US$300 for a 5.8GHZ system.
I don't have a SOLO so I can't tell you if it already includes a Video Tx but these are just about the cheapest part.
What version are you using? I am on Beta 3 and have no problem getting video.
Follow this thread:
This latest beta version does include FPV.
You can connect to your Solo with two devices at the same time. One can run the Solo app for the live feed and access to the smart shots. The other device can run Tower. This is what I do. iPad mini running Solo app, Tower on an Android velcro'd below iPad mini. You can interrupt a Tower mission and take a few smart shots with the Solo app, and then resume the mission. I like the telemetry and related info (including the map) on Tower. I don't even glance at the Solo app telemetry - i use it just for the live feed and smart shots.
Not directly related to the initial question (and 1 year since the last reply...), but perhaps someone in this forum has experienced this same issue using Tower? I just upgraded to the most recent Tower version, Tower-v4.0.0 (from Tower-v3.2.0) and am experiencing random video recording stoppages in the middle of auto-missions. I know its not the GoPro, since I can set the GoPro to record with a large SD and it will run for hours.
I never experienced this issue with previous versions. Anyone here come across this same issue?