With sex.com, I was able to get the sieve to try and show the HLS video. However, the video gives a 403 forbidden error.

It appears there are Cloudfront cookies that need to be loaded with the video but aren't when it's loaded by videojs. I found other cases with videojs where this was a problem but trying the solution I found didn't work.

Since hababr seems to be familiar with [Extension], maybe he would have an idea about how to get it to work.

With two of the other links, it appears that an account is needed to access the pages. These sieves look to be created by numso531. If he's still making sieves it may be best if he's able to fix them since he seems to be familiar with the sites. If he isn't, are there any error messages? It may be the sieves only need small changes.