Plastic Reuse/Recycling:

Good Sources:

https://www.youtube.com/c/OneArmyVideos

https://www.youtube.com/c/BrothersMake

Ironing thin plastic sheets:

https://www.youtube.com/watch?v=ZvwOL_QOs-I

https://www.youtube.com/watch?v=sJANCy3ZAD4

Heating and Kneading:

https://www.youtube.com/watch?v=-igxhoGEQFU

Shredding:

https://www.youtube.com/watch?v=HsKYVhCVPV0&t=606s

https://www.youtube.com/watch?v=Kv72UHO-0c8

https://www.youtube.com/watch?v=4GWYJhAd-R0

Plastic Bottle Sting/Rope Cutting:

https://www.youtube.com/watch?v=TRy2sD_k57g

Plastic Bottle Sting uses:

https://www.youtube.com/watch?v=GSBh77bjz_Q

3D printer filament form plastic bottle string:

https://www.youtube.com/watch?v=E6Pjh18MmXY

Plastic Welding:

https://www.youtube.com/watch?v=6YARfxgyj_Y

Diy Machinery:

Injection Molding:

https://www.youtube.com/watch?v=JtcJAaYVMAg&t=314s

https://www.youtube.com/watch?v=HoSVPHVESiE&t=640s

https://www.youtube.com/watch?v=wd39VTxghZs

https://www.youtube.com/watch?v=5AMkaljguJg

Extruders:

https://www.youtube.com/watch?v=A5DubnjAPCw

https://www.youtube.com/watch?v=zNGuuSKE1pY&t=437s

Presses:

https://www.youtube.com/watch?v=V-GBVacDFoU

https://www.youtube.com/watch?v=j3OctDe3xVk&t=672s