It needs change and that's too loose that are the tensioner isn't tensioning it enough

Hello!
Is there any moment in wich the timing chain is normal to be a little lose? I've seen a video in wich a guy rotates the cams and only in one exact position the timing chain changes from stiff to a little loose. Is that thing normal?
I'm asking this because i changed the valve cover gasket on my '04 Celica, 360k km manual tranny, and i had the BIGGEST unlucky moment to find the cams sitting in the position that makes the chain loose, so i thought omg i need a timing chain kit asap.. Please watch the video from minute 4:30 https://www.youtube.com/watch?v=q9m6zVxqpKc
All i want to know if it's normal to get loose at that cams positions or is there something wrong with the tensioner

Thank you so much!

I have to add this: https://www.youtube.com/shorts/FtXgG1eYyYY
This video was taken by me and you can compare the camshaft positions from my video with the camshaft position form the first youtube link (minute 4:30). They are in the same position (i know, very bad luck..). I got scared when i saw mine was loose. I dont know..the car runs fine.. it sometimes makes an ugly noise on cold startups that last 1-2 seconds. I went to couple mechanics and they said i need the timing chain kit because it should never be loose no matter the position, but i'm not sure

Posted by: @dragos-sabin

I have to add this:> ...

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