worked as advertised

I took high resolution video on a Canon Vixia HFR400, not realizing that it was splitting the recording up into separate files every 4GB (approximately every 15 minutes). I was able to split the video into smaller clips as I wanted with QuickTime Player (free on Macs). (It wasnt extremely clear how to save a single clip to a new file, but you could delete the unneeded parts, duplicate to a new file, then same to the same format it was originally filmed in, then undo to get back the other clips you wanted for a different file.) QuickTime Player could also combine clips, but then would only save them as .mov rather than .mp4, and only in a lower framerate than the original recording. I researched other free options for joining videos but all had mixed reviews, including some complaints of the programs containing malware. This program did exactly what it said it would do, which was join the two .mp4 files (which were originally filmed on the same device with the same settings) without transcoding, and thus there was no change in quality and it merged the files very quickly. I was also pleasantly surprised that I could not hear any audio glitching in the merged files, which was a surprising bonus. (QuickTime Players merged .mov file had an audio glitch.) But, the merge was not perfect -- there is a video glitch where the two clips were merged. Not sure if theres any software that could have avoided it. Overall, this is not something I need to do very often, so was glad there was a curated app in the App Store that could do it for $5.

rhaining23 about Any Video Joiner