FWIW, my latest video is tanking in the "watch %" metric or whatever YT calls it. Just over 3m of a 19m video... and it's 2 angles and I thought it was fairly engaging, covering a wide-ish array of topics and scenery, with some fun corners mixed in and what I thought was good editing. It has 2 camera angles (1 is helmet cam, 2 is aimed at me) and I switch frequently between the two.
It's my longest vlog by far (most are about 8-10m long), and in the first 30 seconds, viewership drops to 48%, ugh! So much for multiple camera angles keeping people engaged. Turns out you have to be talking about the right things and showing scantily-clad women???
I don't understand any of it, and [rant] I'm really considering filming more controversial motorcycle-related topics while sitting on my porch and drinking bourbon, with my riding footage in the background, maybe even with foul language mixed in, just to see what happens. It's frustrating being a tiny YouTuber who wants to be a big YouTuber![/rant]
Anyway, back on topic, Yeah, the 2nd camera angle can really add excitement or engagement, if you do it right. And I'm no expert, so I could be wrong. If you're using an NLE like Resolve or Premiere, they have built-in multicam sync things to sync up your camera angles so you can REALLY EASILY show footage of you riding, while talking into a second camera and stuff, so the audio track stays the same and the footage continues playing. I know Meifesto was talking about doing a mixed-audio voiceover, I do. When I actually do voice-overs, I just drop the audio from the riding footage 100% and use my voice-over and a music track. My #1 viewed video is 4 mins of me doing just that.
-John