Deleted a 4 GB video but storage did not change

My phone has a maximum of 64 GB. I’ve been having problems with storage so I decided to delete a big video file which was 3.95 GB. I deleted it from the Recently Deleted as well. After that, I checked my storage only to see it was the same. 63.6 GB of 64 GB. I restarted my phone and the video was nowhere to be found, but the storage was still the same.

What do I do?

Did the restart do anything?