A few weeks ago, I made a browser-based batch image editor called Apollodorus. The idea was simple enough: pass in as many images as I want, have the same operations (crop, resize, watermark, etc) applied to all of them, and then it spits out all those images with the edits applied. Everything is done client-side too, which is good for privacy, and also good because I was worried about slow WiFi and bandwidth limits. The overall idea was simple, it worked fine in practice, and everything was good.Then a little while ago, I wondered: could I do this with video too?After some research, I realized the answer is technically yes, but it s probably not a great idea. The biggest problem is how demanding it is to edit video if it s all being done client-side, especially via web frameworks like FFmpeg-wasm. From a hardware perspective, editing multiple images is extremely easy, but the same edits on multiple videos though... well, that can get really demanding. And what if it s being done on an old PC with bad specs? Or an old phone? Or a decade-old Chromebook? Would a batch video-editing tool that does everything client-side even make sense for that?Well, I went and made it anyway. My reasoning is, being able to do client-side video editing from any device via the web is just too convenient. That s because I can t install proper video editing software on every device I use. I definitely can t even put regular ffmpeg on my computer at work because the I.T. Department would have a fit. But I can access a website and do most of what I need on there. I can access this from anywhere and since it s all done client side, I don t need to worry about slow WiFi or privacy or anything else. As long as the page loads, everything s good.Anyway, I hope it comes in handy for other people. If you ve ever needed to convert video or resize it or edit it, but don t have access to good software on whatever device you re on, then hopefully this will help out a lot.