B-Roll
Browse, loop and mosaic footage. A Mac app.
Point it at a folder of clips and stills. Find the good three seconds and it loops there every time you open it. Build a playlist of both. Hit Mosaic and every screen you own fills with your footage. It was meant to take a weekend (it's been two years).
Support
Something broken, or something you wish it did? Email b-roll@elroyonline.com. It's me, one bloke in Melbourne, so give me a day. Your macOS version and what you were doing is plenty - and if one file in particular is misbehaving, what format it is.
Privacy
Nothing leaves your Mac. The whole policy fits on one page, and that's mostly me saying it again in more detail.