A little more information......Google updated their autoplay policy in 2018. There can be a variety of reasons why a video is not permitted to autoplay. Some videos will not permit themselves to be autoplayed with the sound on, so adding the &mute=1 flag solves that. Some do not allow to be autoplayed unless the start location is specified (use &start=0 to start at the beginning)
Here is the format I use to autoplay, start at 0, mute the sound, set the language to 0 and turn on closed captioning.
For reference, I use this on a digital sign in the office and lab. It rotates through a bunch of different sets of information:
- displays traditional information from the plant
- some images that are uploaded with pertinent information for the employees
- I am mixing in some other media to change keep people looking at the screen, such as local weather and now going out and grabbing the bbc or sky news and playing 30 sec or a minute of closed caption news.
Here is the most recent autoplay policy for reference.