... (This is in Firefox, in other browsers it will be different -- in Edge it appears at the bottom of the screen): 2_280842_460000000.png 2. wherever it is, you should be able to select Open, or else see a .sk5 file name which can be double-clicked. 3. and when you do that and click OK or whatever (as you can see, Firefox is by far the most informative and user-friendly), 4. you should then see a downloading progress bar like this: 2_280700_080000001.png 5. after which the Templot video player should open in a new window separate from the browser: 2_280700_080000002.png 6. if you click the same link again at any time later, the player should appear immediately without needing to download the video again. 7. you can drag the video around, minimize it, whatever, swap to Templot and still see it, have several videos running at the same time, etc. Which makes this format much more flexible than watching on a web page. But only if it works ...