Yes, Clive just uses a phone and a tablet and does the "editing" on there, which isn't really editing. Even his macro photos are taken with a phone and custom light ring.
That of course works fine unless you want to create other styles of content. But as said, that has its downsides because people subscribe for his one unique style.
There are also, some advantages to there NOT being other people, professionally editing/producing the videos. Because it makes the videos more home-like, honest, easier to watch (as you DON'T need to try to reverse engineer the video production, in your head, to decide what was really going on). I.e. It is closer to watching a person in real life, and more random/real.
Rather than a more professionally produced product, but that then tends to make the proceedings more predictable, similar and less interesting.
E.g. As you get older, I think some people find that they have already seen ALL the movies. Even if the actual movie was ONLY released, yesterday. Because so many things, seem to be done in EXACTLY (in real terms), the same, predictable way (especially with plots and final outcomes).
Linus Tech Tips, is professionally produced, and looks it (if I understand things correctly). But that in some respects, reduces some enjoyable elements.
Frans videos, seem to have a significantly
different style to making the videos, compared to most other electronics youtubers. Very down to Earth, honest, speaking from their heart, lots of words used, very much into the art/love/excitement of electronics/{computers}, rather than the technical or commercial aspects of them.
Fran also (in very approximate terms) seems to present more personality at the videos, even if they try and hold it back. She can sometimes start (or have in it) a video, with the first 10 seconds of it, being just showing face expressions of frustration or similar/other emotions. Before detailing the problems/issues.