Hello @marykirk1961 ...
It sounds like your experience with embedded videos has been different than mine. As an example, I have been working with an instructor the past couple weeks to revise her course content to make her pages more accessible for everyone. In her course, she has several pages where she shares optional videos related to the week's topic. These are mainly YouTube videos. Since we have Canvas Studio, I've been putting these YouTube videos in the instructor's Studio Library, and then embed those videos into her course pages. At times, there are up to six videos per page.
As another example, the instructor had pre-recorded lectures via Canvas. She then moved these videos to Canvas Studio. On separate pages from the ones I've described above, she has lecture pages where sometimes there are up to three short videos on the page (depending on the week's topic).
So, it is possible to have multiple videos on a page. And, yes, I do sometimes see that the embedded Studio videos do take a few seconds to load on the page, but they typically always load without issue.
Have you reached out to Canvas Support about the issue you are experiencing? If not, I would highly recommend that you do so. If you get feedback from Support, please come back to this topic to provide an update so we know how they were able to (hopefully) help you.
Thanks... take care, and be well.