new site support request for mediaamp.io

[echosys]

Checklist

• I'm reporting a new site support request
• I've verified that I'm running youtube-dl version 2019.08.13
• I've checked that all provided URLs are alive and playable in a browser
• I've checked that none of provided URLs violate any copyrights
• I've searched the bugtracker for similar site support requests including closed ones

Example URLs

• Single video: https://www.mediaamp.io/about/
• Single Video: source https://player.mediaamp.io/p/U8-EDC/f2EV94iatoa0/embed/select/media/n7T3h6gC_LRU?autoPlay=false
• Single video2: view-source:https://player.mediaamp.io/p/U8-EDC/HOo9GXupLYen/embed/select/media/lFbyKqAOo1qB?form=html
  access the video content outside of the player will result in "This content is not available from this domain." error, but it is the case only for some videos

Description

The video link can be extracted from page source, but access the video content outside of the player will result in "This content is not available from this domain." error, but it is the case only for some videos. It is the case in example 2.

• Single video: https://www.mediaamp.io/about/
• Single Video: source https://player.mediaamp.io/p/U8-EDC/f2EV94iatoa0/embed/select/media/n7T3h6gC_LRU?autoPlay=false
• Single video2: view-source:https://player.mediaamp.io/p/U8-EDC/HOo9GXupLYen/embed/select/media/lFbyKqAOo1qB?form=html