If I'm not mistaken this is a bit of a factual limit. Since most videos are usually like 25-30 fps (frames per second), slowing them to one frame per second is something like the lowest point.

I did, however, found this online service Video speed changer that you can set to 0.05 and it will generate you a file that much stretched. Although I didn't check exactly how they do the slowing (displaying each frame for several seconds?)

If I'm not mistaken this is a bit of a factual limit. Since most videos are usually like 25-30 fps (frames per second), slowing them to one frame per second is something like the lowest point.

I did, however, found this online service Video speed changer that you can set to 0.05 and it will generate you a file that much stretched. Although I didn't check exactly how they do the slowing (displaying each frame for several seconds?)

I did find such an option in the VSDC Free Video Editor. Although it might be an overkill since it is a full-fledged video editor, it does the job nicely.

You Import the video and then set the Speed to 5 (%). Then do Export Project