The issue arises at every transition, so there are several in each video:
In the “desktop” video:
There is a transition starting at 0:00, from the “horse” video clip to the “trees” video clip. During that transition, you can see that it appears to pause for several frames, before continuing to play the horse video, as well as transitioning to the trees video. That trees video shows a still image for the duration of the transition. Once the transition completes, the trees image appears to “jump”, and the video clip then plays as normal. This continues until 0:03, when it transitions to the video clip showing some stairs. During that transition, the “trees” video appears to play as normal, but the “stairs” video has the same issue of appearing paused until the transition completes, at which time the image appears to jump and then the stairs video plays as normal until the next transition starts at 0:06. At that time, the stairs video appears to freeze until halfway through the transition, at which point it appears to continue playing until the transition is complete. The “rocky coastline” video (which is transitioning in at that time) appears to have the same issue as the rest–it fades in paused, then jumps a bit and continues playing. Once that clip is playing, it continues as normal until 0:10, at which point it freezes for a moment, starts to transition to the “elk” video, then continues playing. The elk video actually appears to load normally through this transition, and plays normally until 0:11, at which time it transitions back to the first video. During this transition, it plays normally until about halfway through the transition, and then appears to jump backwards a few frames and continues playing until the end of the transition. The horse video actually appears to load and play normally during this transition.
In the “phone” video:
I will admit that this video is harder to see the transition “jumpiness”, given that the video recording itself is not smooth. However, the transitions on here are still pretty rough, and also have other issues that are plainly visible. The video starts on the “elk” clip, but the video is zoomed in on what appears to be the top-left section of the clip. It plays plays until 0:01, at which point the clip quickly zooms to 100%. Then, at 0:02, it starts to transition to the “trees” video. It appears to play normally until about halfway through the transition, and then jumps backwards a few frames, and then continues playing normally until the end of the transition. The “trees” video appears to play normally for a second, but it also has the issue of being zoomed in for the first second or so before jumping to the correct zoom. It starts the next transition at 0:06, and does the same play/freeze/play that I’ve previously described. The next video clip (“stairs”) has the same zoomed in issue, but the video does appear to complete its half of the transition smoothly. I’m not certain what the next video is, given that I stopped the recording at this point, but I suspect it’s the “rocky coastline” clip, zoomed in to the top left corner.
As you can see, the issues are sporadic and hard to describe, but they are happening at every transition between these clips, on every page load, on any device. I hope that this helps you see the issue clearer. I can record longer videos of this issue, but given that these are short video clips, I don’t believe that it would help further as it would only show more transitions with the same errors. Please let me know if you have further questions, or what the next steps may be.