I forget to charge it sometimes but that's on me.
I like pacing during meetings
In my case, I was using a Logitech bluetooth headset. When calls came in, I would need to switch the headset on, wait, hope it connects, hope Teams hadn't switched to default mic, and hope the battery was still good. I grew tired of the uncertainty and went back to a wired headset.
There are also DECT headsets which seem to have very low lag. Quality isn't great, but you wouldn't expect it to be given the size of the phones. But it works great for voice and has a very long range.
Imports tariffs for digital video cameras are significantly higher than tariffs for still cameras. So companies like Canon, Nikon, and Sony artificially limit the maximum record time on their DSLRs to get around the higher taxes.
For personal use it's fine. But for work meetings where someone calls you unexpectedly is where things can go wrong if you have unconventional equipment dependencies.
The author recommends an "old DSLR". But you will need utility software running, it's not just a simple driver. Manufacturers make and update these utilities at their discretion. It's a gamble whether it all runs smoothly.
The DSLR needs to be in a special mode, and won't wake up in that mode automatically for incoming calls if powered down, etc.
[*] A power adapter that feeds into a battery shaped terminals, thus allowing an "infinite" battery which. It could be better than USB charging while using the battery because USB charging might not keep up with the battery drain. The downside of course might be malfunctioning dummy battery causing your camera to fry.
Also on shaky ground is the advice to use a DSLR camera as web cam. As pointed out in a recent discussion here, the problem with adding more devices to the chain is... more devices in the chain.
Dedicated diffuse lighting, wireless headsets, separate cameras etc.. participants will need to be patient while you prepare and configure your film set.
I used a wireless headset for awhile, but swapped it for a wired headset after too many times joining meetings without the headset pairing in time.