Video import/preview/compose in AE loops after 5 secs

[WernerHeisenberg]

Though the whole video is nearly 29 seconds. The green horizontal bar spans only 5 sec and the video starts from the beginning. 
I want to include the whole 29 sec video in animation. 
How do I do that? 

[Mylenium]

https://helpx.adobe.com/after-effects/using/previewing.html

Mylenium

[OussK]

you can't do anything it's not akways possible to preview everything at the same time in AE because caching is related to your Memory size and project complexity, the only solution you have is to reduce the preview quality and skip frames if need it, or export a draft preview. AE isn't a video editing software like PP.