Hey Jasper!

I think a good place to start would be checking out some of the pre and post workout mobilizations in the running section of the virtual mobility coach section under sport:

Running

There are many others if you check out the search archive as well. Here is one addressing hip extension:
https://thereadystate.com/2011/07/episode-281-runners-legs-and-hip-extension/

And another video to address the QL:
https://thereadystate.com/2013/02/the-ql-is-not-a-boneeven-in-the-matt-chan/

Check these out and let me know us know if you see any improvements. Best of luck crushing it in soccer!

Cheers,
Mike