A few of us have been getting into doing video blogs for a tech website of ours, plus videos of hardware reviews. It really depends on what/how you want to shoot. Without really professional equipment we've found various success with different cameras for different situations.
We use a Canon GX7 for indoor still videos (apparently this is the video bloggers choice of camera). It seems to have the best all round colour and sound recording.
For night time street shooting, we use a SJ4000 action cam which seems to shoot better at night than the 2 Go Pro 4s we have.
For general daytime street shooting, then it's the Go Pros and the iPhones we have on a gimbal.
We've tried using a DSLR to shoot, but with our shaky hands we need a gimbal, and for a DSLR, they weigh a ton.
If you search this forum there's a thread about the SJ4000. Tbh I can't direct you to where to get a legit one, the China factories have flooded the market with clones of this clone!
My suggestion is grab any old digital camera that can do videos you have lying around and your smartphone and have a play with them to see how some short videos come out. If the video comes out ok but the sound is a bit shabby, just try some cheap mics, we've found that one mic we reuse over and over again is a cheap $99 one from SSP.