- Download a program
To record on PC, Mac or Linux for free use OBS. A good pay option is Camtasia for PC or Mac. They do have a free trial.
- Use console hardware
To record on console for free use a phone to record. Record with high quality means shelling out money. The premiere brand is Elgato. For a second option there is Avermedia.
- Recording from a phone or tablet
Take any phone or camera device and point it at the screen for playing the game and record gameplay that way. This is not the best way because of the video quality to see all the action.
Speedrunning is a fun and dynamic hobby that many people enjoy. It is a great way to connect a wider population of your school. You now have the knowledge to choose, play, time and record the game of your choice. For more information on speed running here is a curated playlist about speedrunning. Now start a school club to begin your journey into speedrunning.