Using this page: On this page, the topic title is linked to the correct BBC Bitesize page for Edexcel exam board. if the topic code (e.g. CB2 is underlines, that is a link to a video reviewing the whole topic. Click on the paper at the top of each subject to find a video for the whole paper). Where you see "(videos)" this has a selection of videos on that topic.
SC2: Separating and purifying substances
SC4: Periodic table
SC5: Ionic bonding
SC6: Covalent bonding
SC8: Acids and alkalis
SC9: Calculations involving masses
SC10: Electrolytic processes
SC11: Obtaining and using metals
SC12: Reversible reactions and dynamic equilibria
SC13: Transition metals, alloys and corrosion
SC14: Quantitative analysis
SC17: Groups in the periodic table
SC18: Rates of reaction
SC19: Heat energy changes in chemical reactions
SC20: Fuels
SC21: Earth and atmospheric science
SC22: Hydrocarbons
SC23: Alcohols and carboxylic acids
SC24: Polymers
SC25: Qualitative analysis / tests for ions
SC26: Bulk and surface properties of matter, inc. nanoparticles
Each topic above has a link to the relevant part of BBC GCSE Bitesize