Some Alpha channel videos are not transparent, any techniques please?

[subashluhagun]

Cartoon Boy with Dancing Twist by 3DSB on Envato Elements

[GoForMotion]

Hi. Maybe this can help:

.MOV files are not working on my computer

Hello. I purchased a yearly subscription, now I’m finding I cannot do anythign with these .mov files??? WHAT do I need to do? They don’t open anywhere and I cannot convert them…