Why do UAPs act differently depending on time of day?

Another question I’ve been turning over and over is why, on the whole, UAPs filmed during the night tend to move relatively slowly, or hover. And UFOs filmed during the day tend to move much, much faster?

Are we only able to see different craft depending on the time of day and they’re always there regardless, just unable to be seen by our equipment?

Obviously this doesn’t stand up to a complete rule that UAPs at night are always slow and UAPs during the day are always fast but we rarely see UAPs filmed during the day that move as slowly as those filmed at night.

What’s your thoughts on this? I’m curious to hear!