(UK, Midlands) Sincerely hoping these aren't ticks or bedbugs, looking for a second opinion

(video at the end of the post, probably the most informative part)

Hi all,

I'm starting to see more of these things around, I looked through the FAB and it didn't quite resemble anything in there. I'm not an entomologist so I'm hoping for help!

The notes -

* 0.5-1mm long (these guys are REALLY tiny) * found a few (1-3) in my bed, some (1-3) in warm places (warm laptops and phones are a favourite, oddly), some crawling on me (1-2) * Lots (10+) seem to be hiding around the cracks in a nearby window frame (1m from bed, painted wood, redeveloped 18th century building) * (I think) shed skins appear periodically on the window sill, small white-grey balls, all similar size (0.6-1mm). * They appear more at night, some are still visible during the day. * Juveniles are white, and very difficult to see * They (I think, it's really hard to tell, they're very small) have a hard shiny shell that divides down the middle (head-to-tail) * I've never encountered one larger than 1mm

Things that make me think (hope) they're not bed bugs:

* No stains on the bedsheets or evidence of bites (yet?) * The feelers look too long, body looks too elongated? * Shell looks like it splits down the middle, not segmented. (This could be wrong)

Thanks, and apologies in advance if these are carpet beetles.

Picture (sorry about the quality, I'm trying my best with my phone's macro settings)


Video: